Question

把多項(xiàng)式2xy²-5x²y³-x³y²+x⁵-1按x的降冪排列是

x⁵-x³y²-5x²y³+2xy²-1

．

Answer 1

分析：按x的指數(shù)從大到小排列即可，注意：排列時帶著項(xiàng)的符號．

解答：解：把多項(xiàng)式2xy²-5x²y³-x³y²+x⁵-1按x的降冪排列為x⁵-x³y²-5x²y³+2xy²-1，
故答案為：x⁵-x³y²-5x²y³+2xy²-1．

點(diǎn)評：本題考查了有關(guān)多項(xiàng)式的排列問題，注意：①按x的降冪排列是指按x的指數(shù)從大到小排列，②排列時帶著項(xiàng)的符號．