(7x+4/7)(7x-4/7)

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Solution for (7x+4/7)(7x-4/7) equation: 


x in (-oo:+oo)

(7*x+4/7)*(7*x-(4/7)) = 0

(7*x+4/7)*(7*x-4/7) = 0

( 7*x+4/7 )

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

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

x = -4/7/7

x = -4/49

( 7*x-4/7 )

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

7*x = 4/7 // : 7

x = 4/7/7

x = 4/49

x in { -4/49, 4/49 }

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