Solve the equation after making an appropriate substitution.x4 - 50x2 + 49 = 0

A. {-50, 50}
B. {-7, 7}
C. {-49, 49}
D. {-7, -1, 1, 7}


Answer: D

Mathematics

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Approximate the value using a calculator. Round your answer to three decimal places.e?

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Rewrite the expression with the given denominator. = 

A.
B.
C.
D.

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