Question

Quanto é x2 - 2x - 8x =63??

Answer 1

Olá, bom dia!

$\mathtt{x^{2}-2x-8x=63}$

$\mathtt{x^{2}-10x-63=0}$

Δ=b²-4.a.c → Δ=(-10)²-4.1.(-63) → Δ=100+252 → Δ=352

x=(-b±√Δ)/2a

x=[-(-10)±√352]/2.1

x=[10±√352]/2

x=[10±4√22]/2

x=5±2√22

x'=5+2√22

x''=5-2√22