Value of p for which ( x ² - 7x -p ) divisible by ( x - 9 ) is
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Step-by-step explanation:
Let f (x) = x² - 7x - p = 0
If f (x) is divided by (x -9),then x- 9 = 0 ⇒ x = 9.
Now substituting or putting " x =9 " in f (x) , we get
f (9 ) = (9)² - 7 (9) - P = 0
⇒ 81 - 63 - p = 0
⇒ 18 - P = 0
⇒ p = 18 is the answer. ( ∵ transposing )
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