The answer is: [A]: 3√ 2 .
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Explanation:
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Simply: -3√ 2 + 3√ 8 ;
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Let us simplify: 3√ 8 ;
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Let us simplify:
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√ 8 ; → √ 8 = √ 4 * √ 2 = 2√ 2 ;
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→ √ 8 = √ 4 * √ 2 = 2√ 2 ;
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→ 3√ 8 = 3 * 2√ 2 = 6√ 2 ;
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So, rewrite the original problem, substituting: "6√ 2" for "3√ 8" ;
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-3√ 2 + 3√ 8 =
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-3√ 2 + 6√ 2 = 3√ 2 ; which is Answer choice: [A].
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