(5-3 \sqrt{ 7 } )-(4+2 \sqrt{ 7) }
Evaluate
1-5\sqrt{7}\approx -12.228756555
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5-3\sqrt{7}-4-2\sqrt{7}
To find the opposite of 4+2\sqrt{7}, find the opposite of each term.
1-3\sqrt{7}-2\sqrt{7}
Subtract 4 from 5 to get 1.
1-5\sqrt{7}
Combine -3\sqrt{7} and -2\sqrt{7} to get -5\sqrt{7}.
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