Solve for x:
x^2 + 7 x - 30 = 0
The left hand side factors into a product with two terms:
(x - 3) (x + 10) = 0
Split into two equations:
x - 3 = 0 or x + 10 = 0
Add 3 to both sides:
x = 3 or x + 10 = 0
Subtract 10 from both sides:
Answer: | x = 3 or x = -10
