SOLUTION: Solve the equation after making an appropriate substitution: x^4-11x^2+28=0

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Question 511256: Solve the equation after making an appropriate substitution:
x^4-11x^2+28=0



Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Sub z for x^2
z%5E2+-+11z+%2B+28+=+0