Question 65163
1. Factor completely:
x^3y – 3x^2y – 10xy 
=xy(x^2-3x-10)
=xy(x-5)(x+2)
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2. Factor completely:
x^2 – 4xy + 12ax – 48ay
=x(x-4y)+12a(x-4y)
=(x-4y)(x+12a) 
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3. Factor completely:
x^2 – 5x – 6
=(x-6)(x+1)
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4. Factor completely:
36x^2 – 4y^2
=4(9x^2-y^2)
=4(3x-y)(3x+y)
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5. Factor completely:
9x2 + 40x + 16
=(9x+4)(x+4)
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6. Factor completely:
3x^2 – 30x + 48 
=3(x^2-10x+16)
=3(x-8)(x-2)
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Cheers,
Stan H.