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anonymous
 one year ago
Find a cubic function with the given zeros.
anonymous
 one year ago
Find a cubic function with the given zeros.

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mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1A polynomial equation with roots a, b, c is f(x) = (x  a)(x  b)(x  c)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0f(x) = (x  a)(x  b)(x  c)\[f(x) = (x  \sqrt{2})(x  \sqrt{2})(x  (2))\]

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1You are close, but a little off. This is what you should have: f(x) = (x  a)(x  b)(x  c) \(f(x) = (x  \sqrt{2})(x  (\sqrt{2}))(x  (2))\) \(f(x) = (x  \sqrt{2})(x +\sqrt{2})(x + 2)\) Now multiply out the three binomials. Hint: Make sure to multiply the first two binomials first because since they are the product of a sum and a difference, you can use the short cut: \((a + b)(a  b) = a^2  b^2\) instead of having to use FOIL.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0f(x)=(x−√2)(x+√2)(x+2) f(x)=22+2?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0its either A f(x) = x^3 + 2x^2  2x + 4 B f(x) = x^3 + 2x^2 + 2x  4 C f(x) = x^3  2x^2  2x  4 D f(x) = x^3 + 2x^2  2x  4

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@Hero i need help too please

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0(a + b^)3 = (a + b)(a^2 + 2ab + b^2) = a^3 + 3a^2b + 3ab^2 + b^3??

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1\(f(x) = \color{red}{(x  \sqrt{2})(x +\sqrt{2})}(x + 2)\) becomes \(f(x) = \color{red}{(x^2  2)}(x + 2)\) Ok so far?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Now we use FOIL for the two binomials above: \(f(x) = (x^2  2)(x + 2)\) \(f(x) = x^3 + 2x^2  2x  4\)
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