Question

Can someone check my answer
For what interval does this quadratic inequality hold ture? x^2−4x−4≤28

A.[2,6]
B. [-4,8]
C. [-1,2]
D. [-2,6]
E. [0,4]

Answer 1

will it be b?

Answer 2

solve x^2 - 4x - 32 <=0 for x
(x -8)(x + 4) <= 0
between x = -4 and x = 8, the inequality is true
for x < -4, the left side exceeds 28
for x > 8, the left side exceeds 28

Answer 3

??

Answer 4

@tkhunny

Answer 5

The interval is -4<=x<=8