Question

Find the difference of the two polynomials : (2t^3 + 3t -4)-(4t^2 - 6t)

Answer 1

Distribute the - which changes the signs in the second parenthesis.
2t^3 + 3t - 4 - 4t^2 + 6t
Combine like terms, must have same exponent. Write in order of degree.
2t^3 - 4t^2 + 9t - 4