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OpenStudy (pengy120):
how do i simplify 4√7-√63? what about √12-7√75?
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OpenStudy (triciaal):
from your multiplication you remember 63 = 7*9 rt 63 can be written as rt7*rt9 and you know rt 9 = 3 so you have 4rt7-3rt7 common or like terms so combine to get rt7
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