If the value of the polynomial m2 - am + 7 for m = - 1 is 10, then find the value of a.
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Answered by
62
Answer:
Solution : p(m) = m2 - am + 7
∴ p(- 1)= (- 1)2 - a × (- 1) + 7 But p(- 1) = 10 (given.)
= 1 + a + 7 ∴ 8 + a = 10
= 8 + a ∴ a = 10 - 8
∴ a = 2
Answered by
16
Answer:
p(m) = m² - am + 7
p(-1) = (-1)² - a * (-1) + 7
=> 10 = 1 + a + 7
=> 10 = 8 + a
=> 10 - 8 = a
=> a = 2
The value of a is 2.
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