Factor the following using the GCF: 10xy3 - 25x2y2 + 15xy
im just confused with gcf
GCF = 5xy
5xy my man.
GCF is greatest common factor for numbers you can find it by first factoring them into primes: 10 = 2*5 25 = 5*5 15 = 3*5 5 is common to all 3 so GCF is 5 as for the letters it is the one with lowest power: x , x^2, x - GCF is x y^3, y^2 , y - GCF is y
Think of it this way: the biggest number that will divide into all the numbers. If it's powers think the biggest power they have in common.
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