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September 1, 2014

September 1, 2014

Posted by **rani** on Sunday, February 27, 2011 at 8:20pm.

I am so lost, i do not know how to start this problem! please help i have a test soon!

- MATH grade 12 -
**agrin04**, Sunday, February 27, 2011 at 11:18pmJust change the variable x with the value x = 2. So, we get:

f(x) = 2x^3 + mx^2 + nx - 3

f(2) = 0 = 2(8) + 4m + 2n - 3

0 = 13 + 4m + 2n. ..(1)

g(x) = 3mx^2 + 2nx + 4

g(2) = 0 = 12m + 4n + 4

0 = 6m + 2n + 2. ..(2)

Using elimination and substitution for both equation (1) and (2), you'll get the values of m and n

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