Question

помогите пожалуйста!!!
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Answer 1

$(-4,5a^5b^4c)^2\cdot(-10abc)=(4,5a^5b^4c)^2\cdot(-10abc)=-4,5^2\cdot a^1^0b^8c^2 \cdot10abc=-(\frac{9}{2})^2\cdot a^1^0b^8c^2 \cdot10abc=-\frac{81}{4}a^1^0b^8c^2\cdot10abc=-\frac{81}{2}a^1^0b^8c^2\cdot5abc=-\frac{405}{2}a^1^1b^9c^3=-202,5a^1^1b^9c^3$