1.(a^2+ab+b^2)(a^2-ab+b^2)
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1.(a^2+ab+b^2)(a^2-ab+b^2)
2.(7x-6y)^2+2(7x-6y)(7x+6y)+(7x+6y)^2
化简求值
1.(2x+y)(2x-y)+(x+y)^2-2(2x^2-xy)其中x=1,y=-1/4
2.已知x=6.61,y=-3.39.求(x-y)(x^2+3xy+y^2)-5xy*(x-y)的值
2.(7x-6y)^2+2(7x-6y)(7x+6y)+(7x+6y)^2
化简求值
1.(2x+y)(2x-y)+(x+y)^2-2(2x^2-xy)其中x=1,y=-1/4
2.已知x=6.61,y=-3.39.求(x-y)(x^2+3xy+y^2)-5xy*(x-y)的值
1.(a^2+ab+b^2)(a^2-ab+b^2)
=[(a^2+b^2)+ab][(a^2+b^2)-ab]
=(a^2+b^2)^2-a^2b^2
=a^4+2a^2b^2+b^4-a^2b^2
=a^4+a^2b^2+b^4
2.(7x-6y)^2+2(7x-6y)(7x+6y)+(7x+6y)^2
=(7x-6y+7x+6y)^2
=(14x)^2
=196x^2
1.(2x+y)(2x-y)+(x+y)^2-2(2x^2-xy)其中x=1,y=-1/4
=4x^2-y^2+x^2+2xy+y^2-4x^2+2xy
=x^2+4xy
=x(x+4y)
=1*(1-1)
=0
2.已知x=6.61,y=-3.39.
(x-y)(x^2+3xy+y^2)-5xy*(x-y)
=(x-y)(x^2+3xy+y^2-5xy)
=(x-y)(x^2-2xy+y^2)
=(x-y)(x-y)^2
=(x-y)^3
=(6.61+3.39)^3
=10^3
=1000
=[(a^2+b^2)+ab][(a^2+b^2)-ab]
=(a^2+b^2)^2-a^2b^2
=a^4+2a^2b^2+b^4-a^2b^2
=a^4+a^2b^2+b^4
2.(7x-6y)^2+2(7x-6y)(7x+6y)+(7x+6y)^2
=(7x-6y+7x+6y)^2
=(14x)^2
=196x^2
1.(2x+y)(2x-y)+(x+y)^2-2(2x^2-xy)其中x=1,y=-1/4
=4x^2-y^2+x^2+2xy+y^2-4x^2+2xy
=x^2+4xy
=x(x+4y)
=1*(1-1)
=0
2.已知x=6.61,y=-3.39.
(x-y)(x^2+3xy+y^2)-5xy*(x-y)
=(x-y)(x^2+3xy+y^2-5xy)
=(x-y)(x^2-2xy+y^2)
=(x-y)(x-y)^2
=(x-y)^3
=(6.61+3.39)^3
=10^3
=1000
a+b/2ab
2AB/A+B
(a-b)(a^2+ab+b) 化简
已知a^2+ab+b^2|ab(a+b),求证(a-b)^3>3ab
因式分解a^+b^+2a^b+2ab^+a^+b^+3ab+a+b
计算ab/(a+b-1)(a+b)+ab/(a+b)(a+b+1)+ab/(a+b+1)(a+b+2)+.+ab/(a+
a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快
1.化简a#-b#/a#ab%[a+(2ab+b#/a)
a^2-3ab+b^2/ab=( )/ab-3
a^2-3ab+b^2/ab=( )/ab -3
1.已知A-B=-根号2 AB=1/3求代数式 (A-B)+A*A+B*B+AB
若a/b=2 则a*a-ab+b*b/a*a+b*b等于?