(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,

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/23 21:44:17
(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

(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,
(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,

(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,
2x^2+14x+24分之x^2+16+8x,其中x=-6
=(x²+8x+16))/2(x²+7x+12)
=(x+4)²/2(x+3)(x+4)
=(x+4)/2(x+3)
=(-6+4)/2(-6+3)
=-2/(-6)
=1/3
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
=x²-(x²-y²)/(y-1)²*(x-y)²/(x²+2xy+y²)-1/(x²+xy)-(x²-xy)/x
这个题目看不懂
分子和分母分不清

2x^2+14x+24分之x^2+16+8x,其中x=-6

最后算出等于-189.5

x=-6
(x^2+16+8x)/(2x^2+14x+24)
=(x+4)^2/2(x+4)(x+3)
=(x+4)/2(x+3)
=(-6+4)/2(-6+3)
=1/3
x=3,y=-2
x^2=9,y^2=4,xy= -6,x+y=1,x-y=5
x^2-(x^2-y^2)/(y-1)^2*(x-y)^2/*(x+y)^2*(x^2+xy-x)/(x^2-xy)
=9-(9-4)/9*25/1*(9-6-3)/(9+6)
=9