Tuesday 15 January 2013

Polynomials Practice 1C

By Mason S309

Refer to Practice 01 p39
2x^2 +5x- 3A(x-B)^2 + C
2x^2 +5x- 3A^22 -2ABx+AB2 + C
Comparing coefficients
2x^2=Ax^2
A=2 A=2 , B = -1 1/4 , C = -6 1/8

5x =-2ABx
5=-4B
B=-1 1/4

-3 =AB^2 +C
-3 =3 1/8 +C
C = -6 1/8
To check if the solution is correct use a suitable graphing tool.
If the solution is correct the 2 graphs should coincide as shown below.

Picture of both equations together . ( Correct values for A , B and C )

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