Question

Which of the numbers −4, −3−1, 3, 4 are a root of the equation: x squared+4x+3=0

Answer 1

x = - 3 and x = - 1

Explanation:

Given

x² + 4x + 3 = 0 ← in standard form

(x + 3)(x + 1) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 3 = 0 ⇒ x = - 3

x + 1 = 0 ⇒ x = - 1

Answer 2

Answer: the roots of the equation are : -3, -1

Explanation:

`x^(2)` + 4x + 3 = 0

by factorizing

(x+1)(x+3) = 0

x+1 = 0 or x + 3 =0

x = -1 or x = -3