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P = 3t² + 7t
Work out the value of P when t = -4

P = 3t² + 7t Work out the value of P when t = -4-example-1

1 Answer

1 vote

Answer:

P = 20

Explanation:

Hello!

We can solve this by substituting -4 for t.

Evaluate

  • P = 3t² + 7t
  • P = 3(-4²) + 7(-4)

Remember that any negative number squared is the absolute value of that number squared.

  • P = 3(|-16|) - 28
  • P = 3(16) - 28
  • P = 48 - 28
  • P = 20

The final evaluation is 20.

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