计算:(-2×10的5次方)²;x的4次方·(-x²)³-(2x的5次方)².
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计算:(-2×10的5次方)²;x的4次方·(-x²)³-(2x的5次方)².
计算:(-2×10的5次方)²;x的4次方·(-x²)³-(2x的5次方)².
计算:(-2×10的5次方)²;x的4次方·(-x²)³-(2x的5次方)².
(-2×10^5)²=4 *10^10
x^4 *(-x²)³-(2x^5)²= - x^4 * x^6 - 4x^10
=- 5 x^10
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