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Mathematics

Grade10

Easy

Question

Factor out the GCF from the polynomial. 10a²b + 12ab²

3ab(6a + 5b)
4a²(a + 5b)
2ab(5a + 6b)
2ab(4a + 5b)

hint Hint:

10a²b = 2 $cross times$ 5 $cross times$ a $cross times$ a $cross times$ b
12ab² = 2 $cross times$ 2 $cross times$ 3 $cross times$ a $cross times$ b $cross times$ b

The correct answer is: 2ab(5a + 6b)

10a²b = 2 $cross times$ 5 $cross times$ a $cross times$ a $cross times$ b
12ab² = 2 $cross times$ 2 $cross times$ 3 $cross times$ a $cross times$ b $cross times$ b
GCF is 2 $cross times$ a $cross times$ b, i.e., 2ab.
2ab(5a + 6b)

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