What are the solutions of the equation x4 + 6x2 + 5 = 0? Use u substitution to solve. x = i and x = iStartRoot 5 EndRoot x = plus-or-minus i and x = plus-or-minus iStartRoot 5 EndRoot x = plus-or-minus StartRoot negative 1 EndRoot and x = plus-or-minus StartRoot negative 5 EndRoot x = plus-or-minus Negative 1 and x = plus-or-minus -StartRoot 5 EndRoot

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.

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