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Prove that `sqrt(98) + sqrt8 - 2 sqrt(32) = sqrt2` |
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Answer» `sqrt(98) + sqrt8 -2 sqrt(32) = sqrt(49 xx 2) + sqrt(4 xx 2) -2 sqrt(16 xx 2)` `=7 sqrt2 + 2 sqrt2-2 xx 4 sqrt2 = 9 sqrt2 - 8sqrt2 = sqrt2` Hence `sqrt98 + sqrt8 -2 sqrt(32) = sqrt2` |
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