Question

find the value of (3+✓2)(3-✓2)​

Answer 1

Answer:

use format a square minus b square

Step-by-step explanation:

(3)^2-(√2)^2 = 9-2 =7

Answer 2

Answer:

$= > (3 + \sqrt{2} ) \times (3 - \sqrt{2} ) \\ \\ = > (by \: using \: idenity \: (a + b)(a - b) = {a}^{2} - {b}^{2} \\ \\ = > (3) {}^{2} - ( \sqrt{2} ) {}^{2} \\ \\ = > 9 - 2 \\ \\ = > 7$

Step-by-step explanation:

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