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.