Question

Simplify (x + 3)(x − 3) please help

Answer 1

(a+b) (a-b) =a²-b²

(x+3) (x-3) =x²-3²

=x²-9

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Answer 2

Answer:

(x+3)(x-3)

[remember:(a+b)(a-b)=a^2-b^2]

so,(x+3)(x-3)

x^2+3^2

x^2+9