Question

2. Simplify
$(2x + 3y + {4})^{2} - (2x + 3y - {4})^{2}$
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Answer 1

Answer:

(4x^2+9y^2+16)-(4x^2+9y^2-16)

4x^2+9y^2+16-4x^2-9y^2+16

16+16=32