Question 235898
factor the polynomial: 
25x(to the 2nd power)-36y(to the second power)
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Any difference of 2 squares a^2 - b^2 = (a+b)*(a-b)
{{{a^2 - b^2 = (a+b)*(a-b)}}}
In this case, a is 5x and b is 6y
= (5x+6y)*(5x-6y)