Question

Complete the square to solve the equation.
x^2+8x-5=15

Answer 1

x^2 + 8x - 20 =0

x^2 + 2*4*x - 20 + 16 -16=0

(x + 4)^2= 36

x + 4 = (36)^1/2

x + 4 = |6|

x = -10,2

Answer 2

Thanks!

Answer 3

some weird business here. answer is right though

Answer 4

try
\[x^2+8x=20\]
\[(x+4)^2=20+16=36\] now next line should be
\[x+4=6\] or
\[x+4=-6\] not
\[x+4=|6|\]

Answer 5

as i said, answer is correct but method is not right

Answer 6

Thank you satellite and ishan!