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hoangvandon
2 năm trước
2) Với a, b, c là các hằng số khác 0. Tính tích các đơn thức sau rồi cho biết bậc của chúng. a, N = (-$\frac{9}{10}$. $a^{3}$. $x^{2}$.y).(-$\frac{5}{3}$$ax^{5}$. $y^{2}$.z) b M = ( $a^{5}$ $b^{2}$ $x^{3}$ $y^{2}$ $z^{n - 3}$ ).( $-bcx^{4}$ $z^{9 - n}$ )
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