How can you solve the range and domain of an equation?math 4

For example, you need to find the range  of an equation, x^2+7

First, you must get the definition right. The range of the equation defines as a set of numerical values that the function (X) would used as x-values changes all the time.

You would get a range like this: X^2>=0.

Next, subtract negative 7 to both side of inequality equation so

X^2-7>=-7. This inequality equation shows that this X^2-7 would take any values that is bigger or equal to -7. So, the range would be like this  (-7 and +infinite values).

The domain of this equation would be a positive set of x-values so domain is x^2>=0, more or equal to zero.