SOLUTION: hello. please help me with these.. ( ' means exponet # after)
Solve each equation.
1. 2x'3 – 5x'2 – 3x + 2 = 2
2. x'3 + 64 = 0
3. x4 – 8x'2 – 9 = 0
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Question 174369: hello. please help me with these.. ( ' means exponet # after)
Solve each equation.
1. 2x'3 – 5x'2 – 3x + 2 = 2
2. x'3 + 64 = 0
3. x4 – 8x'2 – 9 = 0
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Solve:
1) Subtract 2 from both sides.
Factor an x from the left side.
Factor the the parentheses.
Apply the zero product rule.
or or , so...
-------------
2) This is a sum of cubes.
This can be solved thus:
Applying the zero product rule:
or
or
or and these can be expressed in terms of i, as:
or
--------------------------------------------------------------------
3) Rewrite in terms of
Factor this.
Apply the zero product rule:
or , so...
Take the square root of both sides.
or or, in terms of i,
or
Take the square root of both sides.
or
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