初二几道分解因式题,求解
1.x(x+y)-y(x+y)2.(a+b)²+2(a+b)+13.x²-16ax+64a²4.(x-1)(x-3)+15.(ab+a)+(...
1. x(x+y)-y(x+y)
2.(a+b)²+2(a+b)+1
3. x²-16ax+64a²
4.(x-1)(x-3)+1
5.(ab+a)+(b+1)
附上过程,感谢! 展开
2.(a+b)²+2(a+b)+1
3. x²-16ax+64a²
4.(x-1)(x-3)+1
5.(ab+a)+(b+1)
附上过程,感谢! 展开
3个回答
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1, x(x+y)-y(x+y)=(x-y)(x+y)
2.(a+b)²+2(a+b)+1=(a+b+1)^2
3. x²-16ax+64a²=(x-8a)^2
4.(x-1)(x-3)+1=x^2-4x+3+1=x^2+4x+4=(x+2)^2
5.(ab+a)+(b+1)=a(b+1)+(b+1)=(a+1)(b+1)
2.(a+b)²+2(a+b)+1=(a+b+1)^2
3. x²-16ax+64a²=(x-8a)^2
4.(x-1)(x-3)+1=x^2-4x+3+1=x^2+4x+4=(x+2)^2
5.(ab+a)+(b+1)=a(b+1)+(b+1)=(a+1)(b+1)
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1. x(x+y)-y(x+y)=x2+xy-xy-y2=x2-y2=(x+y)(x-y)
2.(a+b)2+2(a+b)+1=(a+b+1)2
3. x2-16ax+64a2=(x-8a)2
4.(x-1)(x-3)+1=(x2-4x+3)+1=x2-4x+4=(x-2)2
5.(ab+a)+(b+1)=ab+a+b+1=(ab+b)+(a+1)=b(a+1)+(a+1)=(a+1)(b+1)
2.(a+b)2+2(a+b)+1=(a+b+1)2
3. x2-16ax+64a2=(x-8a)2
4.(x-1)(x-3)+1=(x2-4x+3)+1=x2-4x+4=(x-2)2
5.(ab+a)+(b+1)=ab+a+b+1=(ab+b)+(a+1)=b(a+1)+(a+1)=(a+1)(b+1)
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1, x(x+y)-y(x+y)
=(x-y)(x+y)
2.(a+b)^2+2(a+b)+1
=(a+b+1)^2
3. x^2-16ax+64a^2
=(x-8a)^2
4.(x-1)(x-3)+1
=x^2-4x+3+1
=x^2+4x+4
=(x+2)^2
5.(ab+a)+(b+1)
=a(b+1)+(b+1)
=(a+1)(b+1)
=(x-y)(x+y)
2.(a+b)^2+2(a+b)+1
=(a+b+1)^2
3. x^2-16ax+64a^2
=(x-8a)^2
4.(x-1)(x-3)+1
=x^2-4x+3+1
=x^2+4x+4
=(x+2)^2
5.(ab+a)+(b+1)
=a(b+1)+(b+1)
=(a+1)(b+1)
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