計時
| (-2)2= (-2)(-2)= +4 (-2)3= (-2)(-2)(-2)= -8 -22= -(2)(2)= -4 (-3)4= (-3)(-3)(-3)(-3)= ?? |
(-2x2)3 = -8x6 (-3x4)4 = 81x16 (-2x4y5)2 = 4x8y10 若有兩變量, 逐個做, 先做 x, 再做 y |
x2+2x2-3x3-4x3= 3x2-7x3 指數相同才可加減 加減時指數不變 2x2(3x3-4x4)= 6x5-8x6 係數相乘, 指數相加 |
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