Question

What is the value of the expression of x=5 6x^3 +8x

Answer 1

790

Explanation:

Substitute the value (x = 5) into the following expression, replace the parameter (x) with the value (5) wherever the parameter (x) is present,

`6x^3+8x`

`6(5)^3+8(5)`

Simplify use the order of operations. The order to operations is the system of steps that one uses to solve an equation, these steps are the following,

1. Parenthesis

2. Exponents or Radicals

3. Multiplication or Division

4. Addition or subtraction

Quick note, a number to any exponent is equal to the number times itself the number of times the exponent indicates.

Use these steps to simplify the given expression,

`6(5)^3+8(5)\\\\=6(125)+8(5)\\\\=750+40\\\\=790`