Hannah R.

asked • 03/01/17

I am doing my math homework and I don't know this answer! I need it by tonight!

Factor 42x + 28y using the GCF

1 Expert Answer

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Andrew M. answered • 03/01/17

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Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors

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42x + 28y
 
Look at the factors of 42 and the factors of 28
 
          42                   28
        2  x 21             2 x 14
      2 x 3 x 7           2 x 2 x 7
 
The largest common factor is 2x7 = 14
 
42 = 14*3 and 28 = 14*2
 
42x + 28y =
14(3x) + 14(2y) =
14(3x + 2y)
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