If p = -10, find the value of-
p² - 2 (p - 15) - 100
Answers
Answered by
0
Answer:
50
Use Sci-Cal
Answered by
5
Given
- p = -10
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To Find
- p² - 2 (p - 15) - 100
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Solution
Method 1 - Simplify the equation and then substitute value of 'p' and solve.
⇒ p² - 2 (p - 15) - 100
⇒ p² - 2 (p) - 2 (-15) - 100
⇒ p² - 2p + 30 - 100
⇒ p² - 2p - 70
Now substitue 'p' with '-10'
⇒ (-10)² - 2 (-10) - 70
⇒ 100 + 20 - 70
⇒ 120 - 70
⇒ 50
Method 2 - Substitute the value of 'p' and solve.
⇒ p² - 2 (p - 15) - 100
⇒ (-10)² - 2 (-10 - 15) - 100
⇒ 100 - 2 (-25) - 100
⇒ 100 + 50 - 100
⇒ 150 - 100
⇒ 50
∴ p² - 2 (p - 15) - 100 = 50 if 'p' = -10
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