Question

If P(x) = x2 + 7 x + 10, then what is the value of P(x) - P(-x) at x = 9?​

Answer 1

Answer:

126

Step-by-step explanation:

p(x) = x² + 7x + 10

x = 9 (given)

∴p(x) = 9² + 7(9) + 10

p(x) = 81 + 63 + 10 = 154

p(-x) =  (-x)² + 7(-x) + 10 =  x² - 7x + 10

p(-x) = 9² - 7(9) + 10

p(-x) = 81 - 63 + 10 = 28

p(x) - p(-x) = 154 - 28 = 126