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Playlist Exponents and Radicals 11 videos
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To solve radical equations, you square both sides, FOIL it out if necessary, and simplify. Ta da!
Start within the parentheses, and then work your way out. Do that, and this expression is yours.
ACT Math 4.4 Elementary Algebra 237 Views
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Description:
ACT Math Elementary Algebra: Drill 4, Problem 4. Solve the expression using the values given.
Transcript
- 00:03
You can't handle the shmoop... For this question, use x = -2, y = -1,
- 00:09
and z = 0. Solve: x over y plus y over x plus z over xy.
- 00:17
And here are the potential answers...
- 00:22
Ok. It just wants us to plug in some
- 00:24
numbers and see what comes out the other side...
Full Transcript
- 00:27
When we do that, we get negative 2 over negative 1 plus negative 1 over negative 2 plus 0 over...
- 00:33
whatever... because 0 over anything is just zero.
- 00:36
So if we simplify, our negative signs cancel out and we get 2 plus a half...
- 00:41
...and the answer is C. There.
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We don't like knocking people down to size, but we do like simplifying radicals. Join us?
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