Question

Evaluate the expression for the given value of the variable. $$ 7 b^{2} \text { when } b=7 $$

Short answer

The evaluated expression is 343

Step-by-step solution

Substitute the given value into the expression

Replace \(b\) with 7 in the expression \(7b^{2}\) leading to the new expression \(7 * (7)^{2}\)

Perform exponentiation

Calculate \(7^2 = 49\), leading to the new expression \(7 * 49\)

Perform multiplication

Multiply 7 by 49 to get the final result, 343.