Question

Equação do 2° grau

(x-2).(x-3) = 12

Answer 1

(x-2)*(x-3)=12
x²-3x-2x+6=12
x²-3x-2x+6-12=0
x²-5x-6=0

a=1
b=(-5)
c=(-6)

Δ=b²-4ac
Δ=(-5)²-4*1*(-6)
Δ=25-4*(-6)
Δ=25+24
Δ=49

x= -b+-√Δ/2a
x= -(-5)+-√49/2*1
x=5+-7/2
x'=5+7/2
x'=12/2
x'=6
x''=5-7/2
x''= -2/2
x''= -1