Equation 23

Find value of unknown x in equation:

x+3/x+1=5

(problem finding x)

Correct result:

x1 =  3
x2 =  1

Solution:

x+3/x+1=5 x2+3+1x=5x  x2+3+1x=5x x24x+3=0  a=1;b=4;c=3 D=b24ac=42413=4 D>0  x1,2=b±D2a=4±42 x1,2=4±22 x1,2=2±1 x1=3 x2=1   Factored form of the equation:  (x3)(x1)=0

Our quadratic equation calculator calculates it.

x2=1



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