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2x+7=0
2x=-7
x=-7/2
x-4=0
x=4
x1<x2=-7/2<4
x1=-7/2
x2=4
2x1+x2=2(-7/2)+4
=-7+4
=-3
(2x+7)(x-4)
x = -7/2 & x = 4
x1 < x2
-7/2 < 4
2.x1 + x2
2.(-7/2) + 4
-7 + 4
-3