Question

x^4-2x^2-15

Answer 1

x^4-2x^2-15=0 find roots ?

Answer 2

Explain, please.

Answer 3

\[x^{4} - 2x^{2} -15 = 0\]\[x^{4} - 5x^{2} + 3x^{2} -15 = 0\]

Answer 4

Its middle term splitting method.

Answer 5

And then?

Answer 6

Another way is to assume $$y = x^2 $$Then substitute,\[y^2 - 2x - 15 = 0\]You now how have a cute n' simple quadratic equation.

Answer 7

....isn't this just a factoring question.....

Answer 8

why solve roots....