a squared +5a-3a squared

To simplify this expression, combine like terms by using the distributive property and combining the coefficients:

a^2 + 5a - 3a^2 = (-3a^2 + a^2) + 5a = -2a^2 + 5a

Therefore, the simplified expression is -2a^2 + 5a.

To simplify the given expression a^2 + 5a - 3a^2, you can combine like terms by combining the coefficients of the same variable.

First, let's combine the terms with the variable "a" (a^2 and -3a^2):

a^2 - 3a^2 + 5a

Since a^2 - 3a^2 is equal to -2a^2, we can rewrite the expression as:

-2a^2 + 5a

Therefore, the simplified expression is -2a^2 + 5a.