factorise (1) 125x³- 27y³+8 +90xy
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(5x)^3 + (-3y)^3 + (2)^3 - 3(5x)(-3y)(2)
= (5x - 3y + 2)[ (5x)^2 + (-3y)^2 + (2)^2 - (5x)(-3y) - (-3y)(2) - (2)(5x)]
= (5x - 3y +2)( 25x^2 + 9y^2 + 4 + 15xy + 6y - 10x)
= (5x - 3y + 2)[ (5x)^2 + (-3y)^2 + (2)^2 - (5x)(-3y) - (-3y)(2) - (2)(5x)]
= (5x - 3y +2)( 25x^2 + 9y^2 + 4 + 15xy + 6y - 10x)
aastha543:
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