exam
Maths Puzzle
Numerical Ability
Simplify each rational expression when possible.
(a-b)(d-c)
__________
(c-d)(a-b)
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exam Other Question
In how many ways can five boys and six girls be seated in a row of eleven seats so that boys and girls occupy alternating seats?
2. The following equation has degree 4 because the highest power of the variable x is 4:
x^4 – 3 x^2 + 2 = 0.
Explain how one can use the quadratic formula to solve this equation by using a change of variable. Solve this equation completely.