Question

Evaluate the expression x+4x-3+3x^2-2x when x = 5

Answer 1

Given:

The expression is

`x+4x-3+3x^2-2x`

To find:

The value of given expression when x=5.

Solution:

We have,

`x+4x-3+3x^2-2x`

Substituting x=5 in the above expression, we get

`=(5)+4(5)-3+3(5)^2-2(5)`

`=5+20-3+3(25)-10`

`=5+20-3+75-10`

On further simplification, we get

`=(5+20+75)+(-3-10)`

`=100+(-13)`

`=100-13`

`=87`

Therefore, values of the given expression at x=5 is 87.