Question

решить 2a2-3a-a2+2a+a-2

Answer 1

2a×2-3a-a×2+2a+a-2
2a×2-3a-1a×2+2a+1a-2
(2-1)a×2+(-3+2+1)a-2
1a×2+0a-2
a×2+0-2
a×2-2
2(a-1)
2a-2