Question

Find out the following products (y+2)(y-2)
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Answer 1

Identity -

$(a + b)(a - b) \: = \: {a}^{2} - {b}^{2}$

Substituting the formula,

$(y + 2)(y - 2) \: = \: {y}^{2} - {2}^{2}$

$(y + 2)(y - 2) \: = \: {y}^{2} - 4$

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