Question

resolva x²+8x+1=0 usando metodo de completar quadrados

Answer 1

x²+8x+1=0

x²+8x+1 +(15)=0 +(15)

x²+8x+16 = 15

(x+4)² = 15

x+4 = ±√15 ↓

=> x+4 = +√15 => x'= -4+√15 ✓

=> x+4 = -√15 => x"= -4-√15 ✓