How would you solve x^4=2x^2-1? Precalculus prerequisites
Stacey Warren - Expert brainly.com
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Start by factoring it.
I believe so, it says solve the equation algebraically.. however, I feel braindead right now, it isn't clicking. I tried factoring, nothing goes into either.. does it?
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As in if you are using the method of what goes into the constant that multiplys to get the constant in front of the x^4 term and also adds to get the middle term. So more or less -1 and -1...
I'm beyond confused.. that doesn't sound familiar at all.. english please? haha
Ok I'll just do whatever else does on here and maybe you'll see it from the answer.
that's like precalc inception, I honestly would never think of that..
There are different ways to factor, I've always begun with the method I tried to describe. If you look, the two negative ones multiply to get the constant of 1 in front of the x^4 and add to get the -2 in the middle.
wait.. so it'd be like (x^2 - 1) (x^2 - 1) as you said, then.. how would you add the -2
if that's already a coefficient?
that's where it doesn't make sense, because I always remembered when factoring you can't take out any coefficients unless your simplifying?