-①4.1x+221.4=4.25x+216 ②43-2(5+3)=3+6(x-1) ③27=x2[19+(20-x)] ④3(3x-2)=10-0.5(x+3.5)5.4x+6=22-12x 6.5.5x+21-x=50-4.5x-11 7.2(3x-4)+7(4-x)=4x 8.19x-3(5x-3)=73 9.40-3x=52-6x 10.28-(7+5x)=4+2(2+4x)以上10题要写出解答过程
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-①4.1x+221.4=4.25x+216②43-2(5+3)=3+6(x-1)③27=x2[19+(20-x)]④3(3x-2)=10-0.5(x+3.5)5.4x+6=22-12x6.5.5x+
-①4.1x+221.4=4.25x+216 ②43-2(5+3)=3+6(x-1) ③27=x2[19+(20-x)] ④3(3x-2)=10-0.5(x+3.5)5.4x+6=22-12x 6.5.5x+21-x=50-4.5x-11 7.2(3x-4)+7(4-x)=4x 8.19x-3(5x-3)=73 9.40-3x=52-6x 10.28-(7+5x)=4+2(2+4x)以上10题要写出解答过程
-①4.1x+221.4=4.25x+216 ②43-2(5+3)=3+6(x-1) ③27=x2[19+(20-x)] ④3(3x-2)=10-0.5(x+3.5)
5.4x+6=22-12x 6.5.5x+21-x=50-4.5x-11 7.2(3x-4)+7(4-x)=4x 8.19x-3(5x-3)=73 9.40-3x=52-6x 10.28-(7+5x)=4+2(2+4x)
以上10题要写出解答过程
-①4.1x+221.4=4.25x+216 ②43-2(5+3)=3+6(x-1) ③27=x2[19+(20-x)] ④3(3x-2)=10-0.5(x+3.5)5.4x+6=22-12x 6.5.5x+21-x=50-4.5x-11 7.2(3x-4)+7(4-x)=4x 8.19x-3(5x-3)=73 9.40-3x=52-6x 10.28-(7+5x)=4+2(2+4x)以上10题要写出解答过程
4.1x+221.4=4.25x+216
0.15x=5.4
x=3.6
②43-2(5+3)=3+6(x-1)
27=6x-3
x=5
-①4.1x+221.4=4.25x+216 ②43-2(5+3)=3+6(x-1) ③27=x2[19+(20-x)] ④3(3x-2)=10-0.5(x+3.5)5.4x+6=22-12x 6.5.5x+21-x=50-4.5x-11 7.2(3x-4)+7(4-x)=4x 8.19x-3(5x-3)=73 9.40-3x=52-6x 10.28-(7+5x)=4+2(2+4x)以上10题要写出解答过程
f(x)=x^2+x (x
① 2x/(x^2+2x-3) +1/(x+3) =1② 2/(^2-1)+ (x-2)/x(x-3) = 1/(x^2+3x)
已知函数①f(x)=-x^2+2x(x>0) ②f(x)=0(x=0) ③f(x)=x^2+mx(x
`已知函数①f(x)=-x^2+2x(x>0)②f(x)=0(x=0)③f(x)=x^2+mx(x
`已知函数①f(x)=-x^2+2x(x>0) ②f(x)=0(x=0) ③f(x)=x^2+mx(x
x^2=x
先化简,再求职①x²-4x+4/x²-4-x+2/x-2 其中x=根号2②(x-1/3x-x+1/x)×x/x²-1 其中,x=2
先化简,再求值.①x(6x-9)-x(8x+15)+2x(3+x).其中x=-1/6②x²(3-x)+x(x²-2x)+1,其中X=根号3
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
x/x平方-x+2=2x/x+1
f(x)=x|x|+2x (x
(X+1)X(X+2)X(X+3)=504
一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X
已知函数f(x)=①2^(-x),x
解几个方程,①x(x+1)(x+2)(x+3)=3 ②x^4+8x^3+14x^+8x+1=0 ③x(x+1)(x^2-2x-4)=0
分式计算:①(1/x-4)-(2/x-3)=(3/x-2)-(4/x-1) ②(x+3/x+4)+(x+8/x+9)=(x+4/x+5)+(x+7/x+8)