Question

(9x+3)(9x-3)
solve using formula
$x + a)(x - b) = {x}^{2} + (a - b) \times x + a \times ( - b)$
​

Answer 1

Answer:

9x² - 3

Step-by-step explanation:

(a+b) (a-b) = a²-b²

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Answer 2

Step-by-step explanation:

x=9 x

a=3

a=3b=3

(x+a) (x-b) = x^2 + (a-b) x +a(-b)

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

81x^2 + 0+(-9)

81x^2 - 9