(x2 +5x +3) + 3/(x2+5x+7)=0. find x
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( x² + 5x + 3 ) + 3 / ( x² + 5x + 7 ) = 0
x² + 5x + 3 + 3 = 0
x² + 5x + 6 = 0
a + b = 5
ab = 6
1 , 6
2 , 3
1 + 6 = 7
2 + 3 = 5
a = 2
b = 3
( x + 2 ) ( x + 3 )
x = - 2
x = - 3
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