因式分解1.-1+y+20y^22.(x^2-3x-5)(x^2-3x+2)+63.(x+1)(x+3)(x+5)(x+7)+15

来源：学生作业帮助网编辑：作业帮时间：2024/05/12 17:05:54

因式分解1.-1+y+20y^22.(x^2-3x-5)(x^2-3x+2)+63.(x+1)(x+3)(x+5)(x+7)+15
因式分解
1.-1+y+20y^2
2.(x^2-3x-5)(x^2-3x+2)+6
3.(x+1)(x+3)(x+5)(x+7)+15

因式分解1.-1+y+20y^22.(x^2-3x-5)(x^2-3x+2)+63.(x+1)(x+3)(x+5)(x+7)+15
1.-1+y+20y^2=(4y+1)(5y-1)
2.(x^2-3x-5)(x^2-3x+2)+6=(x^2-3x-5)^2+7(x^2-3x-5)+6=(x^2-3x-5+1)(x^2-3x-5+6)
=(x^2-3x-4)(x^2-3x+1)=(x^2-3x+1)(x+1)(x-4)
3.(x+1)(x+3)(x+5)(x+7)+15 = (x^2+8x+7)(x^2+8x+15)+15 =(x^2+8x+7)^2+8(x^2+8x+7)+15
=(x^2+8x+7+3)(x^2+8x+7+5)=(x^2+8x+10)(x^2+8x+12) =(x^2+8x+10)(x+2)(x+6)

4(x+y)^2-20(x+y-1)+5因式分解因式分解：（1+x+y)(1-x-y) （x+y)(x+y-1)-12因式分解因式分解:(x+y)-4(x+y-1) 因式分解xy-x-y+1 xy+x+y+1因式分解 1-x-y+xy 因式分解因式分解:xy+x+y+1 xy-1+x-y因式分解 xy-x-y+1因式分解因式分解1.-1+y+20y^22.(x^2-3x-5)(x^2-3x+2)+63.(x+1)(x+3)(x+5)(x+7)+15 把4（x-y+1)+y(y-2x)因式分解（x+y)*（x+1)-(xy+y*y)因式分解为多少因式分解:(x+y)(x-y)+4(y-1) y(y+2)+4x(x-y-1)因式分解是多少因式分解x²y-4y因式分解 (x+y)^2因式分解因式分解：x(y-1)+y(1-y)=?