This week in Precalculus 11 I Learned how to remove the radical. Something that helps you remember what to do when there’s a square root is that it has the same rules when you have to do everything else. First thing you need to remember is whate er we doing one side you do to the other. It’s in the equation you’re adding you need to subtract to isolate the variable. If you’re multiplying need to divide. Lastly if you’re square rooting I need to multiply to the power of two.
Ex 1:
in this first example we need to get rid of the square root to isolate the variable.
step 1:
first step we need to do when there is a square root you must place it to the power of two to get rid of it.
*this is what you’re doing*
Step 2:
now that you have your answer you need to verify it by inputting your X value into the equation.
ex 2:
now that you know how to get to of square roots we are going to try an example that includes our other rules I mentioned.
*reminder
step 1:
First thing you wanna do is get ride of that square root.
step 2:
in this example we have to get rid of our -3 so the opposite of that is to add three on both sides. Remember whatever you do to one side of the = you have to do to the other.
step 3:
now you have your answer the variable is isolated but there is one more thing you have to do.
step 4:
input the X value into your equation and check if your answer is correct
