Question

Simplify(3√7+5) (3√7-5)​

Answer 1

Answer:

$(3 \sqrt{7} + 5)(3 \sqrt{7 } - 5) \\ = {(3 \sqrt{7} )}^{2} - {5}^{2} \: \: \: \: cause \: \: (x + y) \times (x - y) = {x}^{2} - {y}^{2} \\ = 9 \times 7 - 25 \\ = 38$

Answer 2

Answer:

38 Ans.

Step-by-step explanation:

$\: \begin{gathered}(3 \sqrt{7} + 5)(3 \sqrt{7 } - 5) \\ = {(3 \sqrt{7} )}^{2} - {5}^{2} \: \: \: \: cause \: \: (x + y) \times (x - y) = {x}^{2} - {y}^{2} \\ = 9 \times 7 - 25 \\ = 38\end{gathered}$

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