Explicație pas cu pas:
(x-2)(x+3x-1)-(-x)(1-2x)+x(2x+3)
(x-2)×(4x-1)-(-x)(1-2x)+x(2x+3)
(x-2)×(4x-1)+x×(1-2x)+x×=(2x+3)
(x-2)×(4x-1)+x×(1-2x)+2x²+3x
4x²-x-8x+2+x×(1-2x)+2x²+3x
4x²-x-8x+2+x-2x²+2x²+3x
4x²-8x+2-2x²+2x²+3x
4x²-x-8x+2+x-2x²+2x²
4x²-8x+2+3x
soluția:
4x²-5x+2