Question

evaluate the expression.
a = 8 b = 4
(3b - a)²

Explanation:

Step1: Substitute values of a and b

Substitute \( a = 8 \) and \( b = 4 \) into the expression \( (3b - a)^2 \). So we get \( (3\times4 - 8)^2 \).

Step2: Calculate inside the parentheses

First, calculate \( 3\times4 = 12 \), then \( 12 - 8 = 4 \). Now the expression becomes \( 4^2 \).

Step3: Calculate the square

Calculate \( 4^2 = 16 \).

Answer:

16