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
RUDIKE [14]
3 years ago
8

1.Find the zeros of f(x) = x2 - 9

Mathematics
1 answer:
Marat540 [252]3 years ago
6 0
So for the first one it is (x-3)(x+3) this is because it is a difference of squares so you square root the 9 and the minus you do both +and - in order to keep up the -9
The zeros are:x=3 and x=-3 ( this is because you change the sign in the bracket


the others should be pretty simple to do for number 2 its a complex
the third is a simple trinomial
and fourth is simple trinomial as well
You might be interested in
58. A standard six-sided die is rolled.
Lana71 [14]
12 equal likely outcomes or 6*2
4 0
3 years ago
What are the x- and y-intercepts for the graph of −5x − 4y = −20? Plz explain your answer.
yarga [219]

Answer:

-20

Step-by-step explanation:

5

x

−

4

y

=

−

20

Find the x-intercepts.

Tap for more steps...

x-intercept(s):

(

−

4

,

0

)

Find the y-intercepts.

y-intercept(s):

(

0

,

5

)

List the intersections.

x-intercept(s):

(

−

4

,

0

)

y-intercept(s):

(

0

,

5

)

8 0
3 years ago
Read 2 more answers
For all real numbers a and b, 2a • b = a2 + b2 Is this true or false? Explain why it false or true.
Andru [333]

Answer:

It's false.... correct is a2+2ab+b2

Step-by-step explanation:

This cannot be factored anymore although. when we try to substitute a with 5 and b with 2, the answer in the right hand side of the equation is -9.

That's why it's false.

3 0
3 years ago
How do I solve this? Step by step
shutvik [7]

Answer:

24.

Step-by-step explanation:

Substitute each instance of x with a 3.

That leaves us with 3^2 + 3x - 5 + 3^2 - 3x + 11.

Combine like terms.

2(3^2) + 6.

Simplify.

2(9) + 6

18 + 6

24.

8 0
3 years ago
Read 2 more answers
4 less than half a number is equal to 2 more than the number
xxMikexx [17]

Answer:

-12

Step-by-step explanation:

Let that number be x. We can build an equation, and solve for x.

4 less than half of x is x/2-4.

2 more than x is x+2.

We are given that the two quantities are equal, so we have that x/2-4=x+2.

Adding 4 to both sides gives x/2=x+6.

Multiplying both sides by 2 gives x=2(x+6)=2x+12.

Subtracting 2x from both sides gives -x=12.

Multiplying both sides by -1 gives x=-12.

So, the number is \boxed{-12} and we're done!

The check is left as an exercise to the reader.

3 0
2 years ago
Other questions:
  • 4/7 of the students in a classroom are girls if there are nine boys in the class how many total students are there ?
    13·1 answer
  • Help with any of the questions please!
    8·1 answer
  • A group of people in an art class and a crafts class were surveyed whether they exercise more than 5 hours a week or less than 5
    10·1 answer
  • What is the first term in the expansion (2x + 10y)15?
    12·2 answers
  • Why is the annual interest rate more important to a borrower who carries a balance than to a borrower who pays off the
    12·2 answers
  • A wall in marcus room is 8 2/5 feet high as 16 2/3 feet long. If he paints 1/2 the wall blue how many square feet will be blue
    8·1 answer
  • The expression 3A + 2.5S gives the cost in dollars of A adult tickets and S student tickets. What is the cost of 2 adult tickets
    7·1 answer
  • 31 x 8,203<br> Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
    11·2 answers
  • WILL GIVE BRAINLYEST
    12·2 answers
  • PLEASE HELP
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!