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Find the value of the expression: b² - 12 when a= 1/4 and b= 8?

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Final answer:

The value of the expression b² - 12 when b = 8 is 52. This is calculated by squaring 8 to get 64 and then subtracting 12 from it.

Step-by-step explanation:

To find the value of the expression b² - 12 when a = 1/4 and b = 8, you follow these steps:

  • First, understand that the value of 'a' is not needed here as it does not appear in the expression.
  • Next, substitute the value of 'b' (which is 8) into the expression.
  • So, we calculate 8² - 12.
  • 8 squared (8²) is 64.
  • Then, subtract 12 from 64, which gives us 52.

Therefore, the value of the expression b² - 12 when b = 8 is 52.

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