Đáp án:
Giải thích các bước giải:
3)
`3x^2+4x-7`
`=3x^2-3x+7x-7`
`=3x(x-1)+7(x-1)`
`=(x-1)(3x+7)`
Đáp án+Giải thích các bước giải:
Bài `4:`
`3) 3x^2+4x-7`
`=3x^2 -3x + 7x -7`
`=(3x^2-3x)+(7x-7)`
`=3x.(x-1)+7.(x-1)`
`=(3x+7).(x-1)`
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P=((x√x+x-2)/(x-1)-1/(√x+1)):1/(x√x-x) (với x>0:x≠1)
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Ai giúp mình bài này với,mình cảm ơn
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