Question

16qx²-4y² 4a(a-b)²-16(a+b)² 0.25q²-121p² (x²+y²)²-x&su

一共4题，快快快求你们了

Answer 1

有的错了，未来改一下
16x²-4y²
=4(4x²-y²)
=4(2x+y)(2x-y)

4(a-b)²-16(a+b)²
=4[(a-b)²-(2a+2b)²]
=4(a-b++2a+2b)(a-b-2a-2b)
=-4(3a+b)(a+3b)

0.25q²-121p²
=0.25(q²-484p²)
=0.25(q+22p)(q-22p)

(x²+y²)²-x²y²
=(x²+xy+y²)(x²-xy+y²)