Question

Solve. x2 + 8x = –13

Answer 1

(x+4)^2-3=0
x^2+8x+13=0

Answer 2

I'm still confused

Answer 3

What you need help in?

Answer 4

Write out x(x+8)=-13

Answer 5

The final answer?

Answer 6

Final answer is x^2+8x+13=0

Answer 7

Add '-13' to each side of the equation.
13 + 8x + -13 + x2 = 0 + -13

Reorder the terms:
13 + -13 + 8x + x2 = 0 + -13

Combine like terms: 13 + -13 = 0
0 + 8x + x2 = 0 + -13
8x + x2 = 0 + -13

Combine like terms: 0 + -13 = -13
8x + x2 = -13

The x term is 8x. Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = -13 + 16

Reorder the terms:
16 + 8x + x2 = -13 + 16

Combine like terms: -13 + 16 = 3
16 + 8x + x2 = 3

Factor a perfect square on the left side:
(x + 4)(x + 4) = 3
(x + 4) equal to 1.732050808 and -1.732050808

Answer 8

here are the choices

–4 ± √3
–4 ± √17
–4 ± √21
–4 ± √29

Answer 9

Its the first one

Answer 10

–4 ± √29

Answer 11

Wait what? which one is the real correct answer?

Answer 12

Omg everyone is confusing her

Answer 13

–4 ± √29 enter it in your calculator as -4+√29

Answer 14

Yeah, but you both told me different answers I'm super confused

Answer 15

The other person does not know what they are talking about

Answer 16

How did you get the answer for it then?

Answer 17

SImpleton must be smart, Well sometimes guesses work =)

Answer 18

i did x + 4 = 1.732050808

Simplifying
x + 4 = 1.732050808

Reorder the terms:
4 + x = 1.732050808

Solving
4 + x = 1.732050808

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-4' to each side of the equation.
4 + -4 + x = 1.732050808 + -4

Combine like terms: 4 + -4 = 0
0 + x = 1.732050808 + -4
x = 1.732050808 + -4

Combine like terms: 1.732050808 + -4 = -2.267949192
x = -2.267949192

Simplifying
x = -2.267949192

that gives you -4-√29