Răspuns:
4x²+5x-8+x²-1-7x = 5x²-2x-9
6x³-x²+3x-9-2x+8x² =6x³+7x²+x-9
Explicație pas cu pas:
4x²+5x-8+x²-1-7x =
4x²+x²+5x-7x-8-1
5x²-2x-9
6x³-x²+3x-9-2x+8x² =
6x³-x²+8x²+3x-2x-9
6x³+7x²+x-9
