Question

Efectuati urmatoarele calcule reducand termenii asemenea

a) X(x+3)-x(x-3)

b) (x-2)(x+1)-x(x-3)

c) a(b+c)-b(a-c)

d) (2x+1)(2-x)+x(2x+3)

Answer 1

$a)x^{2} + 3x - x^{2} + 3x = 6x \\ b) {x}^{2} + x - 2x - 2 - {x}^{2} + 3x = 2x - 2 \\ c)ab + ac - ab + bc = ac + bc$
$d)4x - 2 {x}^{2} + 2 - x + 2 {x}^{2} + 3x = 6x + 2$