Question 62952
{{{(8X^4 - 5X^3 + 7X^2 - 4X + 1) - (2X^4 - 5X^3 + 2X^2 - 4X + 3)}}}
Multiply all the terms inside the second bracket by -1 (The 1 is implied ). The first bracket can be removed without any problems as there is no number in front of it.
{{{8X^4 - 5X^3 + 7X^2 - 4X + 1 - 2X^4 + 5X^3 - 2X^2 + 4X - 3}}} Now add like terms
{{{6X^4 + 5X^2 - 2}}}