Radical Equation

Hi classmates! This is Djanine and I'm the scribe for today. Well Ms. Ingram talked about radical equation. What is a Radical Equation???

A "radical" equation is an equation in which the variable is stuck inside a radical.

When you have a variable inside a square root, you undo the root by doing the opposite: squaring. For instance, given , you would square both sides:

Examples:

a. 3 + 4 = 7

(3 + 4)2 = 72

49 = 49

Square both sides.

You should always remember to: SQUARE SIDES, NOT TERMS.

b. √4=2
Square both sides.
(√4)2 =(2)2
4=4

Always remember to get rid the radicals.

c. (√18-3x)2=(6)2

Use the Foil method=square 6

18-3x=36
-3x=36-18

Divide them by -3.

X=-6

d. (4√x+2)2=(32)2
16x+32=1024
16x=992

Divide them by 16.

So x will be 62.

The next scribe is Brian L.

By the way, we have a test on Wednesday (April 11).