polynomial equations - real roots

[advancedfunctions]

Determine the real roots of each equation



(5x^2+20)(3x^2-48) = 0



(x^2+1)(2x^2 - x - 13) = 0

[jason.spade]

You wrote down a quadratic, on which you can use the quadratic formula to find its roots, and a factored monic*quadratic. In the second, you can again use the quadratic formula on the quadratic.

[advancedfunctions]

thank you