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khai9203
2 năm trước
1, Tìm N biết a, N- 4$x^{4}$y = 2$x^{4}$y + 9-3y $x^{4}$ b, N + 41$x^{8}$y$z^{6}$ = -25$x^{8}$$z^{6}$y c, 83xy$z^{2}$ - N = 26x$y^{2}$ . (-3y$z^{2}$) 2, Tìm n biết: a,$x^{2}$ .$x^{3n}$ = $x^{11}$ b, 7 $y^{2}$ .$x^{2}$ $y^{2n+1}$ - 8$y^{2n+3}$ = -$y^{15}$
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