Question

Expand and Simplify
$(2 + \sqrt{3} ) ^{2} - (2 - \sqrt{3} ) {}^{2}$
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Answer 1

Step-by-step explanation:

$(2 + \sqrt{3} ) ^{2} - (2 - \sqrt{3} ) {}^{2} \\ 2 \times 2 + \sqrt{3} \times \sqrt{3} - 2 \times 2 - \sqrt{3} \times \sqrt{3} \\ 4 + 3 + 4 - 3 \\ 7 - 1 \\ 6$

Answer 2

As per the rule (a+b)^2
See the picture attached below