15(x-3y)-3(3y-x)² factorasation
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Step-by-step explanation:
= 15x - 45y - 3( 9y² - 6xy + x² )
= 15x - 45y - 27y² + 18xy - 3x²
= - 3x² - 27y² + 18xy + 15x - 45y
= 3( -x² - 9y² + 6xy + 5x - 15y)
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