Respuesta :

Answers:

  • a = 7x
  • b = 3

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Explanation:

Match up (7x+3)(7x-3) with (a+b)(a-b)

We have

  • (7x+3) pair up with (a+b)
  • (7x-3) pair up with (a-b)

We can see that a = 7x and b = 3

Furthermore, we can say,

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

(7x+3)(7x-3) = (7x)^2 - (3)^2

(7x+3)(7x-3) = 49x^2 - 9

The values of a and b are 7x and 3 respectively

(7x+3) (7x−3)

Using the format

Factorisation

(a + b)(a − b) = a² − b²

Therefore,

a = 7x

b = 3

Therefore,

From (a + b)(a − b) = a² − b²

(7x+3) (7x−3) = (7x)² - 3²

(7x+3) (7x−3) = 49x² - 9

learn more on factorisation here: https://brainly.com/question/22190900