Question

Precisava dessa resposta
A) 2x²-8x=0
B) x²+5x=0
C) x²-169=0

Answer 1

A) 2x² - 8x = 0

Δ = (-8)² - 4.2.0
Δ = 64 - 0
Δ = 64

x = -(-8) +-√64/2.2
x = 8 +- 8/ 4
x₁ = 8 +8/ 4
x₁ = 16 / 4
x₁ = 4

x₂ = 8 - 8 / 4
x₂ = 0 / 4
x₂ = 0