先化简,再求徝:(5y+1)(5y-1)-(5y+25y²),其中y=2/5
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先化简,再求徝:(5y+1)(5y-1)-(5y+25y²),其中y=2/5
先化简,再求徝:(5y+1)(5y-1)-(5y+25y²),其中y=2/5
先化简,再求徝:(5y+1)(5y-1)-(5y+25y²),其中y=2/5
:(5y+1)(5y-1)-(5y+25y²)
=25y²-1-5y-25y²
=-1-5y
=-1-5x2/5
=-3
先化简,再求徝:(5y+1)(5y-1)-(5y+25y²),其中y=2/5
y(y-2)²-y(y+3)(y-5) y=1/2 化简求值
y(y-2)²-y(y+3)(y-5) y=1/2 化简求值
y(y-2)²-y(y+3)(y-5) y=1/2 化简求值
先化简,再求值[(2x+y)^2-(2x+y)(2x-y)-y(5x+y)]÷(1/2y),其中x-y=2
5y∧2-(y-2)(3y+1)-2(y+1)(y-5)
解方程:3y^2-(2y+1)(y-1)=(y-5)(y+1)
解方程3y^2-(2y+1)(y-2)=(y-5)(y-1)
解方程:3y²-(2y+1)(y-2)=(y-5)(y+1)
2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1
5(x-y)³-3(x-y)²+7(x-y)-5(x-y)³+(x-y)²-5(x-y),其中,x-y=1/3.5(x-y)³-3(x-y)²+7(x-y)-5(x-y)³+(x-y)²-5(x-y),其中,x-y=1/3先化简,再求值;
y-y-1/2=2-y+5/5一元一次方程
1/2y+1=4y-2/5-y
3(y-3)-5(1+y)=7(y-1)
y-(y-1)/2=1-(2y-3)/5
解方程y-[3y-1]等于5【y+2]
5分之7y等于y+1 y是多少
y''-5y'+6y=3x+1通解