[Phần 1] Ôn tập toán chương 1 (khó)

3

3820266phamtrinh

bài 1 :
a,[TEX](x+y)^2[/TEX] : (x+y) = x+y
b,[TEX](x-y)^5 : (y-x)^4[/TEX]
= [TEX] -(y-x)^5 : (y-x)^4[/TEX]
= - y + x
c,[TEX](x-y+z)^4 : (x-y+z)^3[/TEX] = x - y + z
bài 2 :
a, [TEX](5x^4-3x^3+x^2):3x^2[/TEX]
= [TEX]\frac{5}{3}[/TEX][TEX]x^2-x+\frac{1}{3}[/TEX]
b, [TEX]5xy^2+9xy-x^2y^2):(-xy)[/TEX]
= -5y-9+xy
 
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