Question

What is the value of the expression below when z = 5?

4z2 −7z−2

(the first 2 is exponent)

Answer 1

Answer:To find the value of the expression 4z^2 - 7z - 2 when z = 5, we substitute z with 5 in the expression and simplify it step-by-step.

First, we substitute z with 5 in the expression:

4(5)^2 - 7(5) - 2

Next, we evaluate the exponent:

4(25) - 7(5) - 2

Now, we multiply:

100 - 35 - 2

Finally, we subtract:

100 - 35 = 65

65 - 2 = 63

Therefore, when z = 5, the value of the expression 4z^2 - 7z - 2 is 63.

Explanation: