factorise 3x3y -243xy3
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Answer:
3x³y - 243xy
3xy(x² - 81y²)
3xy[(x)² - (9y)²]
3xy(x+9y)(x - 9y). { using the identity of (a² - b²)= (a+b)(a - b)}
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Answered by
6
3x³y - 243xy³
= 3xy (x² - 81y²)
= 3xy (x + 9y)(x - 9y)
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