Question

How do you solve `x^2+2x-15=0` graphically and algebraically?

Answer 1

3 and - 5

Explanation:

y = x^2 + 2x - 15 = 0
Find 2 real roots (numbers) knowing sum (-b = -2) and product (c = -15). They are 3 and - 5.
graph{x^2 +2x - 15 [-40, 40, -20, 20]}