Question

What is the value of the expression below when z = 6

Answer 1

Answer:

81

Step-by-step explanation:

$2z^2+2z-3$

Using PEMDAS/BODMAS, we will have to do the exponent first, which is $z^{2}$.

Substitute the variable z with 6, since z = 6.

$2(6^{2} )+2(6)-3$

$6^{2} =36$.

Thus, we will get

$2(36)+2(6)-3$

Solve the multiplication next.

$72+12-3$

Finally, add/subtract the numbers:

$84-3$

$81$

Answer 2

Answer:

22

Step-by-step explanation:

2z^2-8z-2                           z=6

2(6)^2-8(6)-2

2(36)-8(6)-2

72-8(6)-2

72-48-2

24-2

22