Question

Need Help with a math question asap

I can't seem to get this one quite right
2(x+8)^(2)+9=29
Answer format: (__,__)

Answer 1

x = {-8 - √10, -8 + √10} exact answer

x = {-11.16, -4.84} decimal approximation

Explanation:

2(x + 8)²+ 9 = 29

Subtract 9 from both sides

2(x + 8)² = 20

Divide both sides by 2

(x + 8)² = 10

Take the square root of both sides

x + 8 = ±√10

Subtract 8 from both sides

x = -8 ± √10

x = {-8 - √10, -8 + √10} exact answer

x = {-11.16, -4.84} decimal approximation