Question

simplify (2square root 2+3 square root 3) ( 2 square root 2_3 square root 3)​

Answer 1

Answer:

$= (2 \sqrt{2} + 3 \sqrt{3} )(2 \sqrt{2} - 3 \sqrt{3} ) \\ = (2 \sqrt{2} ) {}^{2} - (3 \sqrt{2} ) {}^{2} \\ = 8 - 18 \\ = - 10$

Using the identity a^2 - b^2 = (a+b)(a-b)