Question

Please help me solve this

Answer 1

The answer is:  "21" .
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"21" is the GCF of the two values:  "21" and "63xy² " .
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The problem given:
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Find the GCF ("greatest common factor") of the following two (2) terms:
 "21" and "63xy² " .
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There are two (2) terms given:  "21"  and  "63xy² " .
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Since one of the 2 terms is a whole number integer with no variables, we no that the GCF (greatest common factor) has to be an integer.

So we can rewrite the problem as:

Find the GCF of 21 and 63.

Note that: "63÷21 = 3" .

So, "21" is factor of "63".

And "21" is the greatest common factor of itself ("21").
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So, "21" is the GCF of the two values:  "21" and "63xy² " .
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The answer is:  " 21 " .
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