Question

Solve: x^2 - 8x = 48.
A. x = 68
B. x = -12 or -4
C. x = -4 ± 4√3
D. x = -4 or 12

Answer 1

D. x = -4 or 12

Answer 2

rewrite the equation as

\[x^2 - 8x - 48 = 0\]

now you have a quadratic that can be solved by factoring.

find the factors of -48 that add to -8

the larger factor is negative.

then you'll be able to find the solutions.

Answer 3

there you go, why worry about understanding when people just give answers