分解因式负14m乘以x减y的和加7n乘以y减x的和等于负7乘以x减y的和
来源:学生作业帮助网 编辑:作业帮 时间:2024/04/29 16:39:17
原式=-1/4X^2-36Y^2=-1/4(X^2-144Y^2)=-1/4(X+12Y)(X-12Y).再问:刚刚看错了再答:也可以:原式=(6Y+0.5X)(6Y-0.5X)。解题不易,敬请采纳,
m^2(x-y)+m(y-x)=m²(x-y)-m(x-y)=m(x-y)(m-1)
x²-5=x²-(√5)²=(x+√5)(x-√5)2a²-6=2(a²-3)=2[a²-(√3)²]=2(a+√3)(a-√3)
-2x^(3m+1)*y^(2n)*7x^(n-6)*y^(-3-m)+x^4*y为单项式?-2x^(3m+1)*y^(2n)*7x^(n-6)*y^(-3-m)+x^4*y=-14x^(3m+n-5
12m(x+y)的3次方-9n(x+y)的平方=3(x+y)²(4mx+4my-3n)如果本题有什么不明白可以追问,
m(2x+y)^2-m(x+2y)^2=m[(2x+y)^2-(x+2y)^2]=m[2x+y-(x+2y)][2x+y+x+2y]=m(x-y)(3x+3y)=3m(x-y)(x+y)
结果是(x+y-7)的平方
答:x²(x-y)+y-x=(x²-1)(x-y)=(x-1)(x+1)(x-y)
m-5的绝对值加上根号n减去5的平方等于0,所以m-5=0,n-5=0m=5,n=5所以x的平方减去2mxy加上n乘以y的平方=x²-10xy+25y²=(x-5y)²
3a(x-y)m²+12a(y-x)n²=3a(x-y)m²-12a(x-y)n²=3a(x-y)(m²-4n²)=3a(x-y)[m
分解因式(x+y)的平方-14(x+y)+49(x+y)²-14(x+y)+49=(x+y)²-2*7*(x+y)+7²=[(x+y)-7]²=(x+y-7)&
把x+y当做一个因子,7当做一个因子(x+y)^2-14(x+y)+49=(x+y)^2-2*7*(x+y)+7^2=(x+y-7)^2
公因式是mn(x-y)^n所以原式=mn(x-y)^n(n-m)两项中m最低是1次,n最低原式1次而x-y是n和n+1次,则最低是n次所以公因式是mn(x原式=mn(x-y)^n*(-m)mn(x-y
x的平方减2y减y的平方减1=x^2-(y^2+2y+1)=x^2-(y+1)^2=(x+y+1)(x-y-1)
原式=x(x-y)²-2(y-x)³=x(x-y)²+2(x-y)³=(x-y)²×[x+2(x-y)]=(x-y)²(3x-2y)=(x+
x²-4y²=x²-(2y)²=(x+2y)(x-2y)这里用到了平方差公式.很高兴为您解答,祝你学习进步!如果我的回答对你有帮助,请及时选为满意答案,谢谢~~
4x^my+[-xy^(n-1)]是单项式就要求m=22=n-1所以m=2n=3求采纳
2×x²-1={(根号2)x+1}{(根号2)x-1}
5a²(x-y)+10a(y-x)=(x-y)(5a²-10a)=5a(x-y)(a-2)
楼主看一下是不是打错符号了?(m-n)²-2(m-n)(x-y)+(x-y)²=[(m-n)-(x-y)]²=(m-n-x+y)²(m-n)²-2(m