Algebra: Chapter 13, Lesson 6, page 598.
Solving Radical Equations
We can solve radical equations by first using the principle of squaring to find the quadratic equation. Remember, squaring a square root results in the stuff under the radical being displayed without any exponents.
For example the `(sqrt (27 – 3x))^2` is just `27 – 3x`!
If we have formulae and you have to solve it for a given variable, treat that variable as the ONLY one, and treat the other variables as if they are constants. Manipulate the formula to isolate just that variable. See the examples on page 599 for formulae examples. JUST CONCENTRATE ON THE DESIRED VARIABLE AND TREAT THE OTHERS AS IF THEY ARE NUMBERS!
Here are some more examples for purplemath. The pages before and after this one are also pretty good review.
Two of tonight’s homework problems solved by MrE are here! Just click it.
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Algebra 1a: CST Review
TEST PRACTICE #1 – continues today in class!