To solve equations with a variable expression inside a radical, we first want to make sure the radical is isolated. Then we can raise both sides of the equation to a power equal to the index of the radical.
Let's try to solve our equation using this method!
We now have a quadratic equation, and we need to find its roots. To do it, let's identify the values of a, b, and c.
d^2-d-12=0
⇕
1d^2+( - 1)d+( -12)=0
We can see that a= 1, b= - 1, and c= -12. Let's substitute these values into the Quadratic Formula.
