(x-1)(x^2-2)/(x-1)(x-3) sorry if i’m wrong but im pretty sure im right
I got 3x^2 + 12x + 4. I recommend you verify my answer, so you have to combine like terms in the first expression then add all the expressions.
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![x_{1,2} = \frac{-b+- \sqrt{ b^{2} -4ac} }{2a}](https://tex.z-dn.net/?f=%20x_%7B1%2C2%7D%20%3D%20%20%5Cfrac%7B-b%2B-%20%20%5Csqrt%7B%20b%5E%7B2%7D%20-4ac%7D%20%7D%7B2a%7D%20%20)
is the formula for calculating x1 and x2
To prove x1 + x2 = -b/a all we need to do is to express x1 and x2 from equation above
once we do we will get -2b/2a which is equal to -b/a because square root part will negate each other. one has + sign in front and other - sign
Showing that x1x2 = c/a goes similar way.
the numerator parts is actually difference of squares. after that we will have:
-b^2 -b^2 + 4ac = 4ac
in denominator we have 2a*2a = 4a^2
4ac/4aa = c/a
Answer:
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Step-by-step explanation:
Dream did it better than me, you should see his answer.