Question

Solve for x in the equation x squared + 20 x + 100 = 36

Answer 1

Answer:

x = - 16, x = - 4

Step-by-step explanation:

Given

x² + 20x + 100 = 36 ( subtract 36 from both sides )

x² + 20x + 64 = 0

Consider the factors of the constant term (+ 64) which sum to give the coefficient of the x- term (+ 20)

The factors are 16 and 4, since

16 × 4 = 64 and 16 + 4 = 20, thus

(x + 16)(x + 4) = 0

Equate each factor to zero and solve for x

x + 16 = 0 ⇒ x = - 16

x + 4 = 0 ⇒ x = - 4

Answer 2

Answer:

it's A

x = –16 or x = –4