Question

Reduceti termenii asemenea a)x^2-5a+3x^2+7a
b)(4x-b^2)+(8x-2b^2)-12x-3b^2)+(16x-4b^2)-(20x-5b^2)
c)3x(1-2x)+(-2x)^2×(3x-2)+(-x)(2x^2-x+1)

Va rog mult sa ma ajutati
Dau coroana​

Answer 1

a) x^2-5a+3x^2+7a

4x^2+2a

2(2x^2+a)

b) (4x-b^2)+(8x-2b^2)-12x-

3b^2+(16x-4b^2)-(20x-5b^2)

4x-b^2+8x-2b^2-12x-3b^2+16x-4b^2-20x+5b^2

-4x-5b^2

c)3x(1-2x)+(-2x)^2×(3x-2)+(-x)(2x^2-x+1)

3x-6x^2+(2x)^2×(3x-2)-x×(2x^2-x+1)

3x-6x^2+4x^2×(3x-2)-2x^3+x^2-x

3x-6x^2+12x^3-8x^2-2x^3+x^2-x

2x-13x^2+10x^3

10x^3-13x^2+2x

Answer 2

$a) \:{x}^{2}-5a+{3x}^{2}+7a= {4x}^{2} + 2a \\ b) \: (4x -{b}^{2} ) +(8x - {2b}^{2} ) -(12x - {3b}^{2} ) + (16x - {4b}^{2} ) - (20x -{5b}^{2})  =  \\  = 4x - {b}^{2} + 8x - {2b}^{2} - 12x + {3b}^{2} + 16x -  {4b}^{2} - 20x + {5b}^{2} = \\ = {b}^{2} -4x$

$c)3x(1-2x)+ { (-2x)}^{2}×(3x-2)+(-x)( {2x}^{2}-x+1) =  \\  =3x - {6x}^{2} +{12x}^{3} -{8x}^{2} -{2x}^{3} +{x}^{2}- x = \\  =  {10x}^{3} - {13x}^{2} + 2x</p><p>$