Question

escreva as equações na forma geral e resolva
e) x(x-2) =2 (x+6)
f) x(2x-1) + 6 = 4 (x+1)
g) (x-1)(x-2)=6

Answer 1

e) x(x-2) =2 (x+6)
x^2-2x=2x+12
x^2-2x-2x=12
x^2-4x=12

f) x(2x-1) + 6 = 4 (x+1)
2x^2-x+6=4x+4
2x^2+6-4=4x-x
2x^2+2=3x
2x^2+2/3=x

g) (x-1)(x-2)=6
x^2-2x-x+3=6
x^2-3x=6-3
x^2-3x=3