5a^2+10a(b+c)
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5a^2+10a(b+c)
(2xy)^2-3(2x+y)
5(m;-2n)-(m-2n)^2
x^2-2xy+xz-2yz
x^3+x^2-4x-4
(2xy)^2-3(2x+y)
5(m;-2n)-(m-2n)^2
x^2-2xy+xz-2yz
x^3+x^2-4x-4
5a^2+10a(b+c)
=5a[a+2(b+c)]
=5a(a+2b+2c)
(2x+y)^2-3(2x+y)
=(2x+y)(2x+y-3)
5(m-2n)-(m-2n)^2
=(m-2n)[5-(m-2n)]
=(m-2n)(2n-m+5)
x^2-2xy+xz-2yz
=x(x-2y)+z(x-2y)
=(x+z)(x-2y)
x^3+x^2-4x-4
=x^2(x+1)-4(x+1)
=(x^2-4)(x+1)
=(x+2)(x-2)(x+1)
=5a[a+2(b+c)]
=5a(a+2b+2c)
(2x+y)^2-3(2x+y)
=(2x+y)(2x+y-3)
5(m-2n)-(m-2n)^2
=(m-2n)[5-(m-2n)]
=(m-2n)(2n-m+5)
x^2-2xy+xz-2yz
=x(x-2y)+z(x-2y)
=(x+z)(x-2y)
x^3+x^2-4x-4
=x^2(x+1)-4(x+1)
=(x^2-4)(x+1)
=(x+2)(x-2)(x+1)
a+2b+3c=5,4a+3b+2c=10,则a+b+c=?,
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a-b=5,b-c=3,(c-a)(2b-a-c)=
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