(a-b)²+3(a-b)-10 m²/4+mn+n²=2x三次y+8x²y²+8xy三次=3x三次-12x²+12x=还有这三题.TUT如果回答好加悬赏TUT

(a-b)²+3(a-b)-10 m²/4+mn+n²=2x三次y+8x²y²+8xy三次=3x三次-12x²+12x=还有这三题.TUT如果回答好加悬赏TUT
(a-b)²+3(a-b)-10
m²/4+mn+n²=
2x三次y+8x²y²+8xy三次=
3x三次-12x²+12x=
还有这三题.TUT如果回答好加悬赏TUT

(a-b)²+3(a-b)-10 m²/4+mn+n²=2x三次y+8x²y²+8xy三次=3x三次-12x²+12x=还有这三题.TUT如果回答好加悬赏TUT
(a-b)²+3(a-b)-10
=(a-b+5)(a-b-2)
m²/4+mn+n²
=(1/4)(m²+4mn+4n²)
=(1/4)(m+2n)²
2x三次y+8x²y²+8xy三次
=2xy(x²+4xy+4y²)
=2xy(x+2y)²
3x三次-12x²+12x
=3x(x²-4x+4）
=3x(x-2)²

(a-b)²+3(a-b)-10 =(a-b)²+（5-2）(a-b)+5×（-2）=【（a-b)+5】【(a-b)-2】
m²/4+mn+n²=(m/2)²+2×（m/2)×n+n²=（m/2+n)²
2x³y+8x²y²+8xy³=2xy(x²+4xy+(2y)²）=2xy(x+2y)²
3x³-12x²+12x=3x(x²-4x+4)=3x(x-2)²