Question

2x (x+2)+2x (x+1)=x^2+4

Answer 1

2x²+4x+2x²+2x= x² +4
2x²+2x²-x²+4x+2x=4
4x²+6x=4
5x²+6x-4=0

fórmula de braska

a= 4
b= 6
c= -4

-b±√b²-4ac/2a
-6±√6²-4*4*(-4)/2*4
-6±√36+64/8
-6±√100/8
-6±10/8

x'= -6+10/8
4/8

x"= -6-10/8
-16/8
-2

{4/8, -2}