1.

If the value of the polynomial m3 + 2m + a is 12 for m = 2, then find the value of a.

Answer»

p(m) = m3 + 2m + a 

∴ p(2) = (2)3 + 2(2) + a 

∴ 12 = 8 + 4 + a … [∵ p(2)= 12] 

∴ 12 = 12 + a 

∴ a = 12 – 12 

∴ a = 0



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