Question

Question #19980

Answer 1

The correct choice is choice (b), the product is `c/a`.

Explanation:

Use the factorization for a difference of squares to get the product of the numerators:

#(b+\sqrt{b^2-4ac})(b-\sqrt{b^2-4ac}) =(b)^2-(b^2-4ac)=4ac#

The product of the denominator is just `(2a)(2a)=4a^2`. So we get:

`{4ac}/{4a^2}=c/a`