How do I solve questions such as P(x) = 16x^4 - 81
Am I not allowed to use the Quadratic Formula? Are there any conditions to using the Quadratic Formula? Thanks
yes, that's very good! now you notice that what's in the second pair of brackets is also the difference of 2 squares, and what's in the first pair has two imaginary solutions
Nevermind. I tried it, i ended up with something very similar, but i wasn't able to get the imaginary solutions. the above method is best. continueMay I ask what's the other way