Question

(3-x)(3+x) use the suitable identities to find the following products​

Answer 1

Its (a+b)(a-b)

(3+x)(3-x)= x^2-9

Answer 2

Answer:

$(3 - x)(3 + x) = \\ \\ = 9 + 3x - 3x - {x}^{2} \\ \\ {x}^{2} = 9 \\ \\ x = + - 3 \\ \\ \\ \\ \\ 2nd \: method... \\ \\ \\ you \: know(x - y)(x + y) = {x}^{2} - {y}^{2} \\ \\ \\ so \: .. \\ (3 - x)(3 + x) \\ \\ = {3}^{2} - {x}^{2} \\ \\ \\ {x }^{2} = 9 \\ \\ \\ x = + - 3$

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