Question

Спростіть вираз:
1) 2x (3x -7) - 3x (2x + 1)
2) (7 x - 4m) (7x + 4m) - (7x - 4m)²
6) (x + 2) (x² - 2x + 4) - (x - 1) ( x² + 2)
хееееелп пж!!!!!!!!​

Answer 1

1) 6x²-14x-6x²-3x

-14x-3x

-17x

2)49x²-16m²- 49x²+ 56mx-16m²

-32m²+56mx

3)x³+8-x³-2x+x²+2

10-2x+x²

x²-2x+10