Question

Simplify: (√+ 3√7) (√3 -3√7).​

Answer 1

Hey mate here is ur answer ❤❤

Step-by-step explanation:

$( \sqrt{3} + 3 \sqrt{7} )( \sqrt{3} - 3 \sqrt{7} ) \\ using \: identity \\ = a {}^{2} - b {}^{2} = (a + b)(a - b) \\ we \: get \\ = ( \sqrt{3}) {}^{2} - (3 \sqrt{7} ) {}^{2} \\ = 3 - (9 \times 7) \\ = 3 - 63 \\ = - 60$

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