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Simplify: 9x^4(2x^3-5x^4)xx5x^6(x^4-3x^...

Simplify: `9x^4(2x^3-5x^4)xx5x^6(x^4-3x^2)`

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To simplify the expression \( 9x^4(2x^3 - 5x^4) \cdot 5x^6(x^4 - 3x^2) \), we will follow these steps: ### Step 1: Distribute the first part We start by distributing \( 9x^4 \) into the first bracket \( (2x^3 - 5x^4) \). \[ 9x^4 \cdot 2x^3 - 9x^4 \cdot 5x^4 = 18x^{4+3} - 45x^{4+4} = 18x^7 - 45x^8 \] ...
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