Question

1.(2+x)(1-x)
2.x(2-x+x²)
3.x(2-x)-(x-x²)
4.2(x-1)(x+1)
С полным решением, пожалуйста!​

Answer 1

$1)(2 + x)(1 - x) = 2 - 2x + x - {x}^{2} = - {x}^{2} - x + 2;$

$2)x(2 - x + {x}^{2} ) = {x}^{3} - {x}^{2} + 2x;$

$3)x(2 - x) - (x - {x}^{2} ) = 2x - {x}^{2} - x + {x}^{2} = x;$

$4)2(x - 1)(x + 1) = 2( {x}^{2} - 1) = 2 {x}^{2} - 2.$