(1) x+3x=-16 (2) 16y-2.5y-7.5y=5(3) 3x+5=4x+1(4) 9-3y=5y+5 就这4题了、 嗯嗯

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{5(x-3y)-6=2x+1 3(x+6y)+4=9y+19 {3分之2(x-y)=4分之x+y-1 6)x+y)=4(2x-y)+16 下列因式分解不正确的是?A.(x+3)²-1=(x+2)(x+4)B.-x^4+y²=(y+x²)(y-x²)C.2x²y-8y³=2y(x²-4y²)D.x^6-16x²=x²(x²+4)(x+2)(x-2) 解下列方程组(要过程)(1)4(x-y-1)=3(1-y)-2x/2+y/3=2(2)2(x-y)/3 - x+y/4=-16(x+y)-4(2x-y)=16 x=-3分之2 ,y=4分之3,(2+x)(x^2-2x+4)-(x-y)(x^2+xy+y^2)的值.解下列方程7-(2x+1)(4x^2-2x+10+8x(x+1)^2=16(x-1)^2(x-1)(x^2+x+2)-(1+x)(1-x)^2=1 导数的计算练习题导数的计算(1)y=x^5 (2)y=sinx(3)y=1/x^3(4)y=5^√x(5)y=cosx(6)y=5^x(7)y=log3^x(8)y=lnx(9)f(x)=x^3-x^2-x+1(10)y=2x^3-3x^2+4x-1(11)y=x inx(12)y=xsinx-cosx(13)y=cosx/x(14)y=3x(x^2+2)(15)f(x)=(x-1)^2+3(x-1)(16)f(x)=1 解方程组(1) 2(x-y)/3=x+y/4-1 6(x+y)=4(2x-y)+16(2) x+2/3+y-1/2=2 x+2/3+1-y/2=1 (X+3y-16):(2y-4x+16):(2x+Y+4)=1:2:3 (x+y)^2-z^=a^2-(b-c)^2=(x-y)^3-x+y=16(x+y)^2-25(x-y)^2= (1)化简求值:2x^2+14x+24分之x^2+16+8x,其中x=-6当x=3,y=-2,求x^2-(y-1)^2分之x^2-y^2乘以x^2+2yx+y^2分之(x-y)^2-1除以x^2+xy-x分之x^2-xy的值、怎么做, 用代入法解下列方程组:(1)y=3x 16x-y=18 (2)3x+y=8 3x-y=4 (3)x+5y=5 2x-5y=10 (4)2x+y=3 x+2y=-6(5)x=2分之3y+7 y=3分之2x+8 (6)x-2=2(y-1) 2(x-2)+(y-1)要过程,十分急, 二元一次方程 (1) 2(x+y)+3(x-y)=16 2(x+y)-3(x-Y)=8 .分解因式 (1.)(x^2+4y^2)-16x^2y^2(2)(x+1)(x+2)(x+3)(x+6)+x^22.解方程 (1 ){4/(3x-2y)+3/(2x-5y)=10{5/(3x-2y)-2/(2x-5y)=1(2).{|x|+|y|=7{2|x|-3|y|=-13.(-2x-1)^2-(1-2x)^2=______ 解下列方程组(1){y=2x,2x+y=16 (2){4x+3y=5,x-2y=4 {2(x-y)/3=x+y/4-1 6(x+y)=4(2x-y)+16 {2(x-y)/3-x+y/4=-1;6(x+y)-4(2x-y)=16 2(x-y)/3 =x+y/4-1,6(x+y)=4(2x-y)+16 解方程组3(X+Y)-5(X-Y)16 2(X+Y)-1(X-Y)=15 用代入法解方程2(x-y)/3-(x+y)/4=-1① 6(x+y)-4(2x-y)=16②