1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
cricket20 [7]
3 years ago
7

What are the zeros of the function f(x)=x^2-2x-15?

Mathematics
2 answers:
Virty [35]3 years ago
7 0
F(x) = x² - 2x - 15
x = <u>-(-2) +/- √((-2)² - 4(1)(-15))</u>
                        2(1)
x = <u>2 +/- √(4 + 60)</u>
                 2
x = <u>2 +/- √(64)
</u>             2<u>
</u>x = <u>2 +/- 8
</u>           2<u>
</u>x = 1 <u>+</u> 4<u>
</u>x = 1 + 4      x = 1<u /> - 4<u>
</u>x = 5            x = -3<u>
</u>
valkas [14]3 years ago
6 0
To find the zeros of this function, we must first set the entire function equal to 0

f(x) = x² - 2x - 15 = 0

Since this is a quadratic function, we must use the quadratic formula, which is:

\frac{-b +/-  \sqrt{b^{2} - 4(a)(c) } }{2a}

Let's assign a, b, and c using our first function
x² means a = 1 (because it could be written as 1x²)
-2x means b = -2
-15 means c = -15

Now let's plug those in:

\frac{-(-2) +/- \sqrt{(-2)^{2} - 4(1)(-15) } }{2(1)}

which simplifies to:

\frac{2 +/- \sqrt{(4 + 60} }{2}

Simplified further:

\frac{2 +/- \sqrt{(64} }{2}
\frac{2 +/- 8 }{2}
And divide it by the 2 on the bottom gives us:

2 +/- 4

2+4 = 6
2-4 = -2

So the zeros of this function are -2 and 6
You might be interested in
Each cube in this figure is a -centimeter cube. How many cubes are in the prism? [Type your answer as a number.]
NNADVOKAT [17]
4 Times 3 equals 12 so add 12 three times that equals 36 cubes in the prism.
4 0
2 years ago
8x11=(8x10)+(1x10) how can I make it true?
icang [17]
You could make it true by making it (8x10) plus (8x1)

Explanation: 8x11=88 and 8x10=80 and 8x1=8 and 80+8=88
6 0
3 years ago
Read 2 more answers
Verify that the intermediate value theorem applies to the indicated interval and find the value of c guaranteed by the theorem.
Inessa05 [86]

The intermediate value theorem applies to the indicated interval and the importance of c guaranteed by the theorem is c=2,3.

Especially, he has been credited with proving the following five theorems:  a circle is bisected via any diameter; the bottom angles of an isosceles triangle are the same;  the other (“vertical”) angles are shaped by means of the intersection of two traces are same; two triangles are congruent (of identical form and size.

In mathematics, a theorem is an announcement that has been proved or may be proved. The evidence of a theorem is a logical argument that makes use of the inference guidelines of a deductive system to set up that the concept is a logical result of the axioms and formerly proved theorems.

In line with the Oxford dictionary, the definition of the concept is ''a rule or principle, especially in arithmetic, that may be proved to be true''. For example, in arithmetic, the Pythagorean theorem is a  theorem and is maximum extensively used in the domain of science.

2-1

and interval = [4]

since, function fext is continuous in ginen

interval. And also

+(4) = 42+4

4-1

=

20 = 6667

$(5/4) = ($145/2

stone-1

= 5.833

simle, f(4) > $(5/2), hence Intermediate

Theorem & applies to the indicated

proved.

Now,

= 6

C-1

C-5c +6 = 0

C=2 or c=3

1=

3 or

C= 2, 3

<= 2

Learn  more about theorem here brainly.com/question/26594685

#SPJ4

8 0
2 years ago
6.7 times 10^-5 in standard form
alexdok [17]

Answer:

daw

Step-by-step explanation:

8 0
3 years ago
How do you write 1,795/1,000 as a percentage?
NISA [10]
The answer is 179.5%
7 0
2 years ago
Read 2 more answers
Other questions:
  • Help me please find the value
    12·1 answer
  • By selling old CD Sarah has a store credit of $153 a new CD cost $18 what are the problem numbers of new cCD Sarah can buy
    14·1 answer
  • Which equation represents the graph of the linear function?
    7·2 answers
  • 1. Name three examples of each of the types of properties of matter:
    12·1 answer
  • What persent of the model is a circle
    7·2 answers
  • Please help me with this question ASAP
    7·1 answer
  • A glass vase is shaped like a cylinder and has a radius of 2.5 inches. The vase holds 170 cubic inches of water. How tall is the
    11·2 answers
  • this was the question I needed but it didn't give me the answer. I have to find the perimeter of the following shape above but t
    5·2 answers
  • A garden is in the shape of a square with a perimeter of
    10·1 answer
  • F(x) = (x - 1) (4x + 3) (3x - 8) has zeros at x = 3/4, x= 1, and x = 8/3.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!