x2+16x+64=15

Question

x²+16x+64=15

Answer 1

x² + 16x + 64 = 15

the above is equal to:

(x+ 8)² = 15

take square root of both sides:

√((x + 8)²)= ±√15

x + 8 = ±√15

x + 8 -8 = ±√15 - 8

x = -8 ± √15