(7x^2+4x)/(49x^2+16)

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Solution for (7x^2+4x)/(49x^2+16) equation: 


D( x )

49*x^2+16 = 0

49*x^2+16 = 0

49*x^2+16 = 0

49*x^2 = -16 // : 49

x^2 = -16/49

x in (-oo:+oo)

(7*x^2+4*x)/(49*x^2+16) = 0

7*x^2+4*x = 0

x*(7*x+4) = 0

7*x+4 = 0 // - 4

7*x = -4 // : 7

x = -4/7

x*(x+4/7) = 0

(x*(x+4/7))/(49*x^2+16) = 0

( x+4/7 )

x+4/7 = 0 // - 4/7

x = -4/7

( x )

x = 0

x in { -4/7, 0 }

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