观察等式:4x²-5x-6=(x-2)(4x+3),2x²+7x+6=(2x+3)(x+2),分解因
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/05/04 18:30:22
观察等式:4x²-5x-6=(x-2)(4x+3),2x²+7x+6=(2x+3)(x+2),分解因式:-5x+7x+6
4x² - 5x - 6 =4x² + 3x - 8x - 6 = x(4x - 3) - 2(4x - 3) = (x-2) (4x+3)
2x² + 7x + 6 = 2x² + 3x + 4x + 6 = x(2x + 3) + 2(2x + 3) = (2x+3) (x+2)
-5x² + 7x + 6 = -5x² - 3x + 10x + 6 = -x(5x + 3) + 2(5x + 3) = (5x+3) (-x+2)
2x² + 7x + 6 = 2x² + 3x + 4x + 6 = x(2x + 3) + 2(2x + 3) = (2x+3) (x+2)
-5x² + 7x + 6 = -5x² - 3x + 10x + 6 = -x(5x + 3) + 2(5x + 3) = (5x+3) (-x+2)
观察等式:4x²-5x-6=(x-2)(4x+3),2x²+7x+6=(2x+3)(x+2),分解因
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
2x+3x+4x+5x+x+6x+7x=100
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
6/(x+1)=(x+5)/[x(x+1)] (3-x)/(x-4)+1/(4-x)=1 2/(1+x)-3/(1-x)
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
5x-3(2x+1)=6x-4(5-3x)求x
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
(2x-6)/(x²-4x)/(X+3)*( x²+x-6)/(3-x)等于多少?