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Question
3
x
+
4
x
+
1
=
2
,
x
=
?
1
3
2
4
ANSWER : 2
Descrption
3x + 4x + 1 = 2<br> = >3x + 3 + 4xx(x + 1) = 2<br> = >7x + 3 = 2(x2 + x)<br> = > 2x2 - 7x + 2x - 3 = 0<br> = >2x2 - 5x - 3 = 0<br> = > 2x2 - 6x + x - 3 = 0 2x (x - 3) + 1 (x - 3) = 0 (x - 3) (2x + 1) = 0 <br> = > (x - 3) = 0 [(2x + 1) = 0 <br> .'. x = 3
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