Question

What the solution set (x+9)^2=169 of this quadratic equations by extracting the roots? ​

Answer 1

x = - 22, x = 4

Explanation:

Given

(x + 9)² = 169 ( take the square root of both sides )

x + 9 = ±
`√(169)` = ± 13 ( subtract 9 from both sides )

x = - 9 ± 13

Thus

x = - 9 - 13 = - 22

x = - 9 + 13 = 4