Q19. Factorise : 1 - 18x – 63 x2
020. Simplify: (2x - 5y)3 - (2x + 5y) 3
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20) you can make this question by using formula of
a3- b3
=(a-b)(a2+b2 +ab)
kashif746:
i) question check it is wrong or right
then tell me
i will try
sory it's 1-18x-63x^2
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