http://www.ck12.org Chapter 2. Polynomials and Rational Functions
- Solve the following rational equation.
x+ 2
x −3
x+ 2 =6
x^2 + 2 xAnswers:
1.x^3 −x 5 + 4 =x
3 x+ 4 x− 20 =x^2 − 5 x
0 =x^2 − 12 x+ 20
0 = (x− 2 )(x− 10 )
x= 2 , 10
Neither solution is extraneous.
2.R=R 1 +RR 22 +RR^33
100 = 22 +xx+·^2222
78 (x+ 22 ) = 22 x
78 x+ 1716 = 22 x
56 x=− 1716
x=− 30. 65