Kelsey wants to use the Quadratic Formula to solve the equation x4 + 5x2 - 5 = 0. Is this possible? If so, describe the steps she should follow.
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
O A. Yes. It is possible. By substituting u= Kelsey can rewrite the equation as a quadratic equation with the variable u. After finding
solutions for u from the Quadratic Formula, Kelsey can substitute back and solve the resulting equation or equations to find all
possible values of x.
OB. Yes. It is possible. By first factoring out the least common multiple of Kelsey can apply the Zero Product Property and use the
Quadratic Formula for the remaining factor.
O C. Yes. It is possible. By substituting u = Kelsey can rewrite the equation as a quadratic equation with the variable u. The solutions
from the Quadratic Formula are the solutions to the equation x4 + 5x2 - 5=0.
OD. No. It is not possible to use the Quadratic Formula here. The equation is not quadratic.
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