2x^6×x³-3x^9+5x²×x^7等于多少

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2x^6×x³-3x^9+5x²×x^7等于多少
2x^6×x³-3x^9+5x²×x^7等于多少

2x^6×x³-3x^9+5x²×x^7等于多少
解
2x^6*x³-3x^9+5x²*x^7
=2x^9-3x^9+5x^9
=(2-3+5)x^9
=4x^9