Explanation:
12
x + 1 = 0
x = -1
x - 1 = 0 x = 1 Putting x = -1x = -1 in given equation we get Px\(^{1}\) + x\(^{1}\) - 2x + 9
= P(-1)\(^{1}\) + (-1)\(^{1}\) - 2(-1) + 9
= -P + 1 + 2 + 9 = -P + 12 ? -P = -12
\(\therefore\) P = 12 Putting x = 1 is given equation we get Px\(^{1}\) + x\(^{1}\) - 2x + 9
P(1)\(^{1}\) + 12 - 2 × 1 + 9
P + 1 - 2 + 9 P - 1 + 9
P + 8 = 0 ? P = -8 So, P = (12, -8) So value of P is 12 as negative can no be accepted