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Answer has to be explained verbally. I can provide a full written proof.
xlnx - x
√32 + √18
= 4√2 + 3√2
= 7√2
The cosine rule,
a2=b2+c2-2bccosA,
where a, b, & c are the sides of a triangle and A is the angle opposite side a, is the general version of Pythagoras' ...
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