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How do you factor #15a+21#?

Answer 1

Eva Adamson

#15a+21= color(blue)(3(5a+7))#

The constants in the terms of the given expression have a common factor of #color(blue)(3)#

Once this factor has been extracted the remaining factor #color(blue)(""(5a+7))# has no further sub-factors.

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Answer 2

Nathan Axel

To factor (15a + 21), you can first find the greatest common factor (GCF) of the terms. In this case, the GCF of 15 and 21 is 3. Then, you factor out the GCF from both terms to obtain (3(5a + 7)). Therefore, (15a + 21) factored is (3(5a + 7)).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.