Final answer:
To evaluate the given expression, we need to distribute the negative sign and combine like terms.
Step-by-step explanation:
To evaluate the expression (x^(2)+2x+5)-(-2x^(2)+6), we need to distribute the negative sign to each term inside the parentheses. This allows us to rewrite the expression as x^(2)+2x+5+2x^(2)-6.
Next, we can combine like terms by adding the coefficients of x^(2) and x. This gives us 3x^(2)+2x-1.
Therefore, the simplified form of the expression is 3x^(2)+2x-1.