1.

For the polynomial mx2 – 2x + 3 if p(-1) = 7, then find m.

Answer»

p(x) = mx2 – 2x + 3 

∴ p(- 1) = m (- 1)2 – 2(- 1) + 3 

∴ 7 = m(1) + 2 + 3 …[∵ p(-1) = 7] 

∴ 7 = m + 5 

∴ m = 7 – 5 

∴ m = 2



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