Question

2 Efectuati, respectând ordinea efectuării operatiilor:
(x-2)(x+3x - 1)-(-x) (1 - 2x) + X(2x + 3).​

Answer 1

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