Question

0=x^2 +3x−40
solve the equation

Answer 1

x = 5, or x = -8

Explanation:

First, factor the left side of the equation

x^2 + 3x -40 = 0

(x - 5)(x + 8) = 0

Then, set both factors equal to 0

x - 5 = 0

x + 8 = 0

Use addition and subtraction for each equation to isolate x

x - 5 = 0

x = 5

x + 8 = 0

x = -8

So, by factoring this equation, we found two possible solutions

x = 5

and

x = -8