Question

Resolver as questões com forma de baskara (2x+1)^2-2x(2+x)=6.(2+x)

Answer 1

(2x+1)^2-2x(2+x)=12+2x

(2x+1.2x+1)-2x(2+x) =12+2x

4x^2+1-4x-2x^2=12+2x

2x^2+1-4x=12+2x

2x^2-4x=12-1+2x

2x^2-4x-2x=11

2x^2-6x=11

2x^2-6x-11=0

a=2 b=-6 c=-11

∆=-(-6)^2-4.2.-11

∆=6^2-4.2.-11

∆=36+88

∆=124

X=-(-6)+/-√124 X=6+/-11,1

2.2 4 X=1,5+/-2,7

X1=1,5.2,7=4,2

X2=1,5-2,7=-1,2