f(x)=x²+3x|x-2|
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
初一数学x*x+2x+5的值为7,请求3x*x+6x+3的值.因为x*x+2x2x+3=3x(x*x+2x)+2x+2x
(先化简后求值)(3x/x+2-x/x-2)+2x/x^2-4,x=4-根号5,
4X减3.7x=12 4.2x加2.5x=1.34 8X减3x=15.6 (x减3)除2=7.5 35X加13x=9.6
道解方程题①8x=63+3x②3(x-2)+9.6x=5.2③5x+12=6x-6
道解方程题①8x=63+3x②3(x-2)+9.6x=5.2③5x+13=6x-6
x(x^2-1)+2x^2 *(x+1)-3x*(2x-5)=x(3x^2-4x)-28
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
5x/(x+3)(x+2)+(2x-5)/(x-4)(x+3)=(7x-70)/(x+2)(x+4)