Question

Evaluate the expression when y=5.
z² – 7y - 6

Answer 1

Explanation:

• y = 5

Substitute the value of y in the expression.

`\implies \sf {z}^(2) - 7y - 6 \\ \implies \sf {z}^(2) - 7(5) - 6 \\ \implies \sf {z}^(2) - 35 - 6 \\ \implies \sf {z}^(2) - 41`

Therefore, z² – 41 is the answer.