JOIN NOW

Mathematics

Solve the following equation by factorization:

x2 + 18x = 40

Quadratic Equations

2 Likes

Answer

Given,

⇒ x2 + 18x = 40

⇒ x2 + 18x - 40 = 0

⇒ x2 + 20x - 2x - 40 = 0

⇒ x(x + 20) - 2(x + 20) = 0

⇒ (x - 2)(x + 20) = 0

⇒ x - 2 = 0 or x + 20 = 0      [Using Zero-product rule]

⇒ x = 2 or x = -20.

Hence, x = {-20, 2}.

Answered By

1 Like

Related Questions