Answer:
x = 4
Step-by-step explanation:
x(x + 8) = 48
x² + 8x = 48
x² + 8x - 48 = 0
times into -48
add into 8
(x - 4)(x + 12) = 0
x - 4 = 0
or
x + 12 = 0
x = -12
A length cannot be a negative number therefore x = 4
-31
since x+5 is a factor then
x=(-5)
f(-5)=-5×3-4×2+3×-5+7
=-15-8-15+7
=-30-1
=-31
The Answer is 2160000000
27
hope this helped <3