
Solving
Radical Equations:
So the solution is x = 16. Copyright © Elizabeth Stapel 20022011 All Rights Reserved
(Note that the "plus one" is outside the cube root.)
So the solution is x = ^{1}/_{3}.
Then the solution is x = ^{– 1}/_{2}, ^{– 1}/_{3}. Since cube roots can have negative numbers inside them, you don't tend to have the difficulty with them regarding checking the answers that you did with square roots. However, you will have those difficulties with fourth roots, sixth roots, eighth roots, etc; namely, any evenindex root. Be careful! You may or may not be required to show solutions graphically, but if you have a graphing calculator (so drawing the graphs is just a matter of quickly punching a few buttons), you can use the graphs to check your work on tests. In any case, be careful with your squaring ("Square sides, not terms!"), do each step carefully, and don't forget to "Check your solutions!" << Previous Top  1  2  3  4  5  6  Return to Index


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