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
Likurg_2 [28]
2 years ago
5

Use the formula to solve the equation x^2 + 9x + 8 = 0.

Mathematics
1 answer:
Delvig [45]2 years ago
3 0

Answer:

x=-8, -1

Step-by-step explanation:

Given the equation x^{2} +9x+8=0\\,

By the quadratic formula,

x=\frac{-b+-\sqrt{b^{2}-4ac } }{2a},

x=\frac{-(9)+-\sqrt{(9)^{2}-4(1)(8) } }{2(1)}=\frac{-9+-\sqrt{49 } }{2}=\frac{-9+-7 }{2}

We have two different solutions for x where x=\frac{-9-7 }{2} and x=\frac{-9+7 }{2}

So, x = -16/2=-8 and x=-2/2=-1

Therefore, the solutions to this quadratic equation is x = -8, -1, by the quadratic formula.

You might be interested in
What is the lateral surface area of the solid? Assume the top and bottom of
timama [110]

Check the picture below.

so the lateral area will be just the area of the sides, namely excluding the bases at top and bottom, thus

\stackrel{\textit{\LARGE Lateral Area}}{\stackrel{\textit{front and back}}{2(4)(5)}~~ + ~~\stackrel{\textit{left and right}}{2(4)(7)}}\implies 40~~ + ~~56\implies 96~cm^2

4 0
2 years ago
Read 2 more answers
Hii please help i’ll give brainliest
BlackZzzverrR [31]

Answer:

3rd one

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
For which function is f(x) equal to f^-1(x)?
Ilia_Sergeevich [38]
We will find the inverse of the given functions:
 y = x + 2 / x-2
 (x-2) y = x + 2
 -2y + xy = x + 2
 -2y + xy = x + 2
 x (y - 1) = 2 + 2y
 x (y - 1) = 2 (y + 1)
 x = 2 (y + 1) / (y - 1)
 f (x) ^ - 1 = 2 (x + 1) / (x - 1)
 The inverse is different.
 f (x) = x + 1 / x-1
 
y = x + 1 / x-1
 (x-1) y = x + 1
 -y + xy = x + 1
 x (y - 1) = 1 + y
 x (y - 1) = (y + 1)
 x = (y + 1) / (y - 1)
 f (x) ^ - 1 = (x + 1) / (x - 1)
 The inverse is the same.
 Answer:
 
f (x) = x + 1 / x-1
 
f (x) ^ - 1 = (x + 1) / (x - 1)
 f (x) = f (x) ^ - 1
4 0
3 years ago
Read 2 more answers
Find the intervals on which f(x)=2xx2+64 increases.
Shtirlitz [24]

f(0)=64, f(1)=66, f(2)=72, f(3)=82, f(4)=96,...=2,6,10,14,...=2{1,3,5,7,...}
This can be written 2{2x+1}, so the intervals on which f(x) increases are 4x+2.
4 0
3 years ago
Determine If The Triangles Are Similar.If They Are,Choose The Reason Why.
Mariana [72]

Answer:

because they all have 3 corners

4 0
3 years ago
Other questions:
  • 3x+4+5x+10 simplify combining like terms
    15·2 answers
  • Help with number 13 please
    10·1 answer
  • Plzzzzzzzzzzz Need Fast 15 points
    11·2 answers
  • Simplify: 9^-3<br><br><br> Please help!
    13·1 answer
  • 35.<br> Write the fraction<br> in simplest form.<br> 40
    11·2 answers
  • B-4/6=b/2 solve for b
    11·1 answer
  • The equation 9(u – 2) + 1.5u = 8.25 models the total miles Michael traveled one afternoon while sledding, where u equals the num
    7·2 answers
  • The temperature was -12 degrees in the morning and rose to a high of 27 degrees for the day. What was the increase in temperatur
    12·2 answers
  • Please help me with my sample work
    7·1 answer
  • Please help. giving brainliest. 10 points
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!