Question 84 (vii)

Simplify

$(x^{2} - 4) + (x^{2} + 4) + 16$

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Solution

We have,
$(x^{2} - 4) + (x^{2} + 4) + 16 = x^{2} - 4 + x^{2} + 4 + 16 = 2 x^{2} + 16$

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Question 84 (vii)

Simplify

$(x^{2} - 4) + (x^{2} + 4) + 16$

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Question 84 (iv)

Simplify

${(\frac{3}{4} x - \frac{4}{3} y)}^{2} + 2 x y$

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