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Question
Submitted by kj52freak on Fri, 2012-01-20 00:26
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x2 + 30x + 198 = 0

x2 + 30x + 198 = 0

Answer
Submitted by shahimermaid on Fri, 2012-01-20 08:45
teacher rated 387 times
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find factors and split the middle term

body preview (30 words)

which is xxx xxxxxxxx in this case xx

xxxx xxxx

30^2 - x xx x xxxx xxx - xxx x xxx

x b xxx xx rt 108=

-30 x 10.39

-30 xxxxxx

x will xxxx xx value, -40.39 x xxxxxx


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Answer
Submitted by philablue on Fri, 2012-01-20 04:31
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answer

body preview (49 words)

1) in case xxx problem xxx 2x+30x+198=0

xxxxxxxxxxxxx <x>

xxxxxxxxx <=>

xxxxxxxx => xx -198/32 => xxxxxxx

xx in case xxxx problem was xxx x xxx +198=0

xxxxxxxxx =>

d=30^2-4*198 => d=108

d>x x> x x1,x2

xxxxxxxxxxxxxxxxxx

x2=(-30-sqrt108)/2


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