Question

simplify expression??
(-3x^2 + 11x + x^4) - (x^2 + 14x - 9x^4)

Answer 1

When you subtract polynomials you should change the "-" sign that is in between the two polynomials to a "+" and then change the sign of every term in the second set of parentheses.

ex. (-3x^2 + 11x + x^4) + (-x^2 - 14x + 9x^4)

Answer 2

Then you add like terms... you should always put the highest powered x first down to the lowest powered x.. so in this case You should add x^4 _ 9x^4 first and get 10x^4.

Then add the x^2s so you get -3x^2 - x^2 = -4x^2

Then add the xs so you get 11x - 14x = -3x

So your answer is 10x^4 - 4x^2 - 3x

Do you understand?