Question

Solve the equation by completing the square

Answer 1

Below.

Explanation:

x^2 + 4x = 18

x^2 + 4x + (2)^2 = 15 + 2^2

x^2 + 4x + 4 = 18 + 4

(x + 2)^2 = 22

x + 2 = +/- √22

x = -2 + √22 and x = -2 + √22

x = 2.7 and -6.7 to nearest tenth.