Question

3x ao quadrado = 2. (x + 21)

Answer 1

Explicação passo-a-passo

3x²= 2x + 42

3x²-2x-42=0

Δ= (-2)² -4.3.42

Δ= 4-504

Δ=500

x'= 2+√500÷ 2.3

x'= 2+22,36÷6

x'=24,36÷6

x'= 4,06

x''= 2-√500÷2.3

x''=2-22,36÷6

x''=20,36÷6

x''= 3,393