(14x/4x+4)(x2+3x+2/21x2)

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Solution for (14x/4x+4)(x2+3x+2/21x2) equation: 


x in (-oo:+oo)

(((14*x)/4)*x+4)*(x^2+(2/21)*x^2+3*x) = 0

(7/2*x^2+4)*(23/21*x^2+3*x) = 0

23/21*x^2+3*x = 0

x*(23/21*x+3) = 0

23/21*x+3 = 0 // - 3

23/21*x = -3 // : 23/21

x = -3/23/21

x = -63/23

x*(x+63/23) = 0

x*(7/2*x^2+4)*(x+63/23) = 0

( 7/2*x^2+4 )

7/2*x^2 = -4 // : 7/2

x^2 = -8/7

( x+63/23 )

x+63/23 = 0 // - 63/23

x = -63/23

( x )

x = 0

x in { -63/23, 0 }

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