Question

(С-4р)^2
(2x-1)(2x+1)-2x(3x-5)
6y(y+5)-(2y-3)^2
4(x-2y)^2+16xy
b^2-16
X^2-6x+9
25a^2-81y^2
4y^3-y
Помогите решить к/Р очень надо

Answer 1

с^2-8cp+14p

2x^2+2x-2x-1-6x+10x = 2x^2+4x-1 

6y^2+30y-4y^2-12y+9 = 2y^2+28y+9

4*(x^2-4xy+4y)+16xy = 4x^2-16xy+14y+16xy = 4x^2+14y = 2*(2x^2+7y) 

b^2-16 = b^2-4^2 = (b-4)*(b+4)

X^2-6x+9 = (x-3)^2

25a^2-81y^2 = 5*(5a^2a-16.2y^2)

4y^3-y = y*(4^y2-1)