Simplify. Remember to use absolute-value notation when necessary. If a root cannot be simplified, state this. it have a check sign(a+3)^2

Answer 1

The check sign (√) indicates square root. The square root of any squared value is that value.

Answer 2

(a+3)^2=a*a + 2*a*3 + 3*3 = a^2 + 6a+ 9