因式分解:
x^4-3x^2+6x+8
=(x+1)(x+2)(x^2-3x+4)
2x³y+8x²y²+8xy³山哗闹芦游
=2xy(x²+4xy+4y²)
=2xy(x+2y)²
b²+ 2ab+c²-2ac
=(b²-c²)+(2ab-2ac)
=(b+c)(b-c)+2a(b-c)
=(b-c)(b+c+2a)
(a+ b)^2 +(a^2-b^2)
=(a+b)^2+(a+b)(a-b)
=(a+b)(a+b+a-b)
=2a(a+b)
a^2-b^2+(-a-b)
=(a+b)(a-b)-(a+b)
=(a+b)(a-b-1)
m²+n²逗罩+2mn-p²
=(m+n)²-p²
=(m+n+p)(m+n-p)