(5t4 + 6t3 – 3t2 + 4t - 11) - (-9t4 – 6t3 + 5t2 + 3t + 8)

Can somone help me ?
Simplify . . .

Online "^" is used to indicate and exponent, e.g., x^2 = x squared.

A minus times a minus = a plus.

5t^4 + 6t^3 - 3t^2 + 4t - 11 + 9t^4 + 6t^3 - 5t^2 -3t - 8

Combine like terms.

i don't know how to . . .

Of course! To simplify the given expression, we can distribute the negative sign to every term inside the parentheses of the second expression. This will change the signs of each term inside the parentheses.

So, the expression becomes:

5t4 + 6t3 – 3t2 + 4t - 11 + 9t4 + 6t3 - 5t2 - 3t - 8

Next, we can combine like terms by grouping them together.

Starting with the terms with the highest power of t (in this case, t4), we have:
(5t4 + 9t4) = 14t4

Next, the terms with the power of t^3:
(6t3 + 6t3) = 12t3

Moving on to the terms with the power of t^2:
(-3t2 - 5t2) = -8t2

Now, let's consider the terms with the power of t:
(4t - 3t) = t

Lastly, let's look at the constant terms:
(-11 - 8) = -19

Putting it all together, the expression simplifies to:

14t4 + 12t3 - 8t2 + t - 19