Question

помогите решить 1, 2, 3​

Answer 1

1. 1) (4х-у)(16х²+4ху+у²)

2) а(36а²-b²)=a(6a-b)(6a+b)

3) -3x²-12x-12=-3(x²+4+4)=-3(x+2)²

4)3ab+12b-15a-60=3b(a+4)-15(a+4)=(a+4)(3b-15)=3(a+4)(b-5)

5) a⁴-625=(a²-25)(a²+25)=(a-5)(a+5)(a²+25)

2. x(x²-1)-(x³+2x²+4x-2x²-4x-8)=x³-x-x³+8=8-x

3. 1) 7m-n+(49m²-n²)=(7m-n)+(7m-n)(7m+n)=(7m-n)(7m+n+1)

2) 4x²-4xy+y²-16=(2x-y)²-16=(2x-y-16)(2x-y+16)

3) xy⁴-2y⁴-xy+2y=y⁴(x-2)-y(x-2)=(x-2)(y⁴-y)=y(x-2)(y³-1)=y(x-2)(y-1)(y²+y+1)

4) 9-x²-2xy-y²=-(x+y-3)(x+y+3)