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Determine the value of y, if x is -8 . y=x^(2)-2 Answer:

Determine the value of y y , if x x is −8-8 .\newliney=x2−2 y=x^{2}-2 \newlineAnswer:

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Sin, cos, and tan of special anglesright chevron icon

Full solution

Q. Determine the value of y y , if x x is −8-8 .\newliney=x2−2 y=x^{2}-2 \newlineAnswer:
  1. Substitute xx in equation: Substitute the value of xx into the equation.\newlineWe are given x=−8x = -8 and the equation y=x2−2y = x^2 - 2. We need to substitute −8-8 for xx in the equation.\newlineCalculation: y=(−8)2−2y = (-8)^2 - 2
  2. Calculate square of −8-8: Calculate the square of −8-8. The square of −8-8 is 6464 because (−8)×(−8)=64(-8) \times (-8) = 64. Calculation: y=64−2y = 64 - 2
  3. Subtract 22 from 6464: Subtract 22 from 6464 to find the value of yy.\newlineNow we subtract 22 from 6464 to get the value of yy.\newlineCalculation: y=64−2=62y = 64 - 2 = 62

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