factorise 125x square +64y
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I think u should check your question once again its incomplete
It should be 125x^3-64y^3 and its solution is
(5x)^3 -(4y)^3
Now put the formula of a^3-b^3 which is
(a-b)(a^2+ab+b^2) where a=5 and b=4
on putting the value
=[5x-4y][(5x)^2 5x*4y+(4y)^2]
=[5x-4y][25x^2+20xy+16y^2]
Hope u will be able to understand.
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