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OpenStudy (anonymous):
What is the exact value of the expression sqrt72 − sqrt8 +sqrt128 ? Simplify if possible.
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jhonyy9 (jhonyy9):
72=9*4*2 so than sqrt72=3*2sqrt2=6sqrt2 sqrt8=2sqrt2 sqrt128=sqrt(64*2)=8sqrt2 so than 6sqrt2 -2sqrt2 +8sqrt2=12sqrt2
jhonyy9 (jhonyy9):
ok ?
OpenStudy (anonymous):
aweso0me :) thank you
jhonyy9 (jhonyy9):
merry christmas ! good luck bye
OpenStudy (anonymous):
another way of showing your answer: |dw:1324837625187:dw|
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