Factorise: (a.) 9x2 – 625
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Answered by
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hey mate
Factorise: (a.) 9x2 – 625
Answer:
=9x²-625
=(3x)²- (25)²
we know that ,
a²-b²=(a+b)(a-b)
so,
= (3x-25)(3x+25)
thus:
factor will be
(3x-25)(3x+25)
I hopes its helps u
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