10) -4a²x⁴
11) -(-64x⁹c³) = 64x⁹c³
12) -(a⁸b¹²c¹⁶) = -a⁸b¹²c¹⁶
3.
1) 20a³ * 25a² = 500a⁵
2) -0,4x⁵ * 16x¹² = -6,4x¹⁷
3) c⁶*12c⁶ = 12c¹²
4) 81x²⁴y¹² * (-xy²/81) = -x²⁵y¹⁴
5) -8/27 *a³b¹⁵ * 18a⁵b = -16/3 a⁸b¹⁶
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Verified answer
10) -4a²x⁴
11) -(-64x⁹c³) = 64x⁹c³
12) -(a⁸b¹²c¹⁶) = -a⁸b¹²c¹⁶
3.
1) 20a³ * 25a² = 500a⁵
2) -0,4x⁵ * 16x¹² = -6,4x¹⁷
3) c⁶*12c⁶ = 12c¹²
4) 81x²⁴y¹² * (-xy²/81) = -x²⁵y¹⁴
5) -8/27 *a³b¹⁵ * 18a⁵b = -16/3 a⁸b¹⁶