3x^2-2x+5-6x^2+3x-9
1个回答
原式=(3-6)x^2+(3-2)x+5-9
=-3x^2+x-4
相关问题
21-x/2+x/3-2x/5=x x+2/3+x=10-2x/7 9-3x-2/5=7-3x/6
x²-9/x²+2x-3乘3x²-x-2/x²-5x+6,
3x²-2x+5-6x²+3x-9
(X^3-1)/(X-1)= (9x^3-6X^2-5X+2)/(3X-1)=
解方程:(1)x²-6x+9=0 (2(x-3)(-x-3)-(x-2)²+2x(x-3)=5
(1)5+2x=1 (2)8-x=3x+2 (3)10x-3=9 (4)6x-7=4x-5 (5)1/2x-6=3/4x
(x^2+3x+9)/(x^2-9)+6x/(9x-x^2)-(x-1)/(6+2x)
【(-2x^2y^3)^2*x-2x(5xy^2)^3】/(9x^2y^6)
x²--5x--2=0 9(2x+3)²--4(2x--5)²=0 (6x²--
X-5+9-3+8+2+6=2X