2(x-y)+a(x-y)
0.48x^2-0.04y^2
-4a^2+4ab-1
已知a+b=-2,ab=-5/2,求a(a+b)-a(a+b)^2
解方程2x^2-3x=0 (3y+5)^2=4y^2
(m-n)^3+2n(n-m)^2
1/2a^3b+2a^2b^2+2ab^3
(4x^2-25y^2)除以(2x-5y)
(2x^3-2x+1/2)除以(x-1/2)
2(x-y)+a(x-y)
0.48x^2-0.04y^2
-4a^2+4ab-1
已知a+b=-2,ab=-5/2,求a(a+b)-a(a+b)^2
解方程2x^2-3x=0 (3y+5)^2=4y^2
(m-n)^3+2n(n-m)^2
1/2a^3b+2a^2b^2+2ab^3
(4x^2-25y^2)除以(2x-5y)
(2x^3-2x+1/2)除以(x-1/2)
2(x-y)+a(x-y) =(a+2)(x-y)
0.48x^2-0.04y^2=(0.48x+0.04y)(0.48x-0.04y)
-4a^2+4ab-1=-(2a-1)^2
已知a+b=-2,ab=-5/2,求a(a+b)-a(a+b)^2
解:原式=a(a+b)(1-(a+b))
因为a+b=-2,ab=-5/2
所以结果为-6a……无语
解方程2x^2-3x=0
x=1.5或0
(3y+5)^2=4y^2
y=-5
(m-n)^3+2n(n-m)^2=(m-n)^2(m+n)
1/2a^3b+2a^2b^2+2ab^3=?
(4x^2-25y^2)除以(2x-5y)=2x+5y
(2x^3-2x+1/2)除以(x-1/2)=2x-1/2