Answer:
x=-5 or x=-7
Explanation:
x² + 12x = -35
x² + 12x + 35 = 0
now you find two values that have a product of c (35) but a sum of b (12)
7+5 = 35
7+5 = 12
(x + 7)(x + 5) = 0
now you take each bracket to find the two values of x
x + 7 = 0
x = 0 - 7
x = -7
or
x + 5 = 0
x = 0 - 5
x = -5