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Question
If p = − 10, evaluate:
3p2 – 20p
Sum
Solution
3p2 – 20p
= (3 × p × p) − (20 × p)
= (3 × (− 10) × (− 10)) − (20 × (− 10))
= 300 − (− 200)
= 300 + 200
= 500
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