Question

Evaluate the expression,if x=12, y=8, and z=3xy2 – 3z 3

Answer 1

$\frac{xy^2-3z}{3}$

x = 12, y = 8, and z = 3

Substitute their values in the expression above

$\frac{(12)(8)^2-3(3)}{3}$

At first find 8^2

8^2 = 64

Multiply 3 by 3

3 * 3 = 9

$\frac{12(64)-9}{3}$

Now multiply 12 by 64

12 * 64 = 768

$\frac{768-9}{3}=\frac{759}{3}$

Simplify the fraction by dividing up and down

$\frac{759}{3}=253$

The value of the expression is 253