-16a^2b^2c÷(1/4a^2b)=

sleepingpills2022-10-04 11:39:542条回答

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82xiw 共回答了14个问题 | 采纳率92.9%: 6x-1=2
x=1/2
y²-y-2=0
(y-2)(y+1)=0
y=2,y=-1
(5x²y+5xy-7x)-(4x²y+5xy-7x)
=5x²y+5xy-7x-4x²y-5xy+7x
=x²y
=(1/2)²×2或(1/2)²×(-1)
=1/2或-1/4; 1年前

马元元共回答了21806个问题 | 采纳率: =-16×4(a²/a²)(b²/b)c
=-64bc; 1年前

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