In this video, we are going to solve simple equations containing radical expression.
In , first square both sides of the equation
If there are other values in the equation, then first isolate the before squaring both sides of the equation.
In the second part, we are going to solve more complex equations containing radical expression.
Square both sides of the equation
Use FOIL to complete the squaring if necessary
Combine like terms
Since it’s a quadratic equation, use the quadratic equation
Substitute the variables
So we have:
In the end, x is approximately 7.8 or 3.2
If it was -7.8 instead of 7.8, then it cannot be a negative answer since the square root of a negative number is imaginary. In this case, the final answer would just be 3.2