Question

21. Simplify : [2√2 + 3√3] [2√2 - 3√3)​

Answer 1

Answer:

-19

Step-by-step explanation:

using identity a²-b² = (a+b) (a-b)

[2√2 + 3√3] [2√2 - 3√3] = (2√2)² - (3√3)²

=>8 - 27

=>-19

Answer 2

Step-by-step explanation:

$(2 \sqrt{2} + 3 \sqrt{3} )(2 \sqrt{2} - 3 \sqrt{3)}$

by using formula

$(x + y)(x - y) = x {}^{2} - y {}^{2}$

we get

$(2 \sqrt{2} ) {}^{2} - (3 \sqrt{3} ) {}^{2} \\ = 8 - 27 \\ = - 19$

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