Question

I WILL GIVE MEDAL AND BECOME FAN

Solve the equation by completing the square. Round to the nearest tenth.

x^2+8x=10

A. 1.1, 9.1
B. 1.1, -9.1
C. -1.1, 9.1
D. -1.1, -9.1

Please give me the answer and tell me how you did it! Thanks! :)

Answer 1

x^2+8x+4^2 = 10 + 4^2
x^2+8x +16 = 10+16
(x+4)^2 = 26

now try to complete it by following this instruction on this site http://www.purplemath.com/modules/sqrquad.htm

Answer 2

I think I understand, is it A? That's what I got...

Answer 3

why do you think it is A?
did you actually solved it

Answer 4

I tried... haha