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Determine the value of 
y, if 
x is -9 .

y=x^(2)-1
Answer:

Determine the value of y y , if x x is 9-9 .\newliney=x21 y=x^{2}-1 \newlineAnswer:

Full solution

Q. Determine the value of y y , if x x is 9-9 .\newliney=x21 y=x^{2}-1 \newlineAnswer:
  1. Substitute xx into function: Substitute the given value of xx into the function.\newlineWe have the function y=x21y = x^2 - 1 and we need to find the value of yy when xx is 9-9.\newlineSubstitute x=9x = -9 into the function.\newliney=(9)21y = (-9)^2 - 1
  2. Calculate square of 9-9: Calculate the square of 9-9.(9)2=81(-9)^2 = 81Now, substitute this value back into the equation for yy.y=811y = 81 - 1
  3. Subtract 11 from 8181: Subtract 11 from 8181 to find the value of yy.y=811y = 81 - 1y=80y = 80

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