Question

9x² - 25 =
[2 marks]​

Answer 1

Answer:

9x*2 - 25

(3x)*2 - 5*2

So, we know (a*-b*) = (a+b)(a-b)

(3x + 5) (3x - 5)

Hence, x = 5/3 , -5/3

Answer 2

x = 5/3

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