Question

determine the value of y, if x is 5.
y = x² - 3

Explanation:

Step1: Substitute \( x = 5 \) into the equation

We have the equation \( y = x^2 - 3 \), and we know \( x = 5 \). So we substitute \( x \) with 5 in the equation, getting \( y = 5^2 - 3 \).

Step2: Calculate \( 5^2 \)

First, calculate \( 5^2 \), which is \( 5\times5 = 25 \). So now the equation becomes \( y = 25 - 3 \).

Step3: Subtract to find \( y \)

Subtract 3 from 25: \( 25 - 3 = 22 \).

Answer:

22