Answer:
x = 3, -10
Step-by-step explanation:
Step 1: Write out quadratic
f(x) = x² + 7x - 30
Step 2: Set quadratic equal to 0
0 = x² + 7x - 30
Step 3: Factor quadratic
0 = (x - 3)(x + 10)
Step 4: Find roots
x - 3 = 0
x = 3
x + 10 = 0
x = -10
