Question

2 grau: A,(x elevado a 2 -12x=5=30)
B,(4x elevado a 2 + 3x- 12 =8)

Answer 1

x²-12x-5=30

vamos igualar a zero

x²-12x-35=0

Δ=b²-4·ac

Δ=144+140

Δ=284

x=6+2√71

x=6-2√71

4x²+3x-12=8

4x²+3x-20=0

Δ=9+320

x=-3+√329÷2

x=-3-√329÷2