Factorise:
Question:

Factorise:

$2-50 x^{2}$

 

Solution:

$2-50 x^{2}$

$=2\left(1-25 x^{2}\right)$

$=2\left[1^{2}-(5 x)^{2}\right]$

$=2(1+5 x)(1-5 x) \quad\left[a^{2}-b^{2}=(a+b)(a-b)\right]$

 

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