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Question
Submitted by keyera.cohen on Mon, 2012-03-05 13:33
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answered 2 time(s)
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x squared minus 3x plus 4 equals 0

x squared minus 3x plus 4 equals 0

Answer
Submitted by ujwala on Tue, 2012-03-06 04:10
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price: $2.00

(3/2)+(7^1/2)i

body preview (54 words)

The quadratic xxxxxxx is xxxxxxx xxxx the xxxxxxx xxxxxxxxx xxxxxxxx (below) xx xxxxxxxxxx xxx square.

The xxxxxxx quadratic equation...
xxxx + bx x c x x

has xxxxxxxx

xxxxxxxxxxxx xx in the attachment

and xxxx xxx example xxxxx the link

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

xx x have xxx doubts u can xxxxxxx xx

my xxxx id xx xxxxxxxxxxxxxxxxxxxx

file1.docx preview (45 words)

xxx xxxxxxxxx formula xx xxxxxxx xxxx the xxxxxxx quadratic equation (below) xx xxxxxxxxxx the square.

xxx xxxxxxx quadratic equation...

xx² x bx + c x 0

xxx xxxxxxxx

            


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Answer
Submitted by dayamath on Mon, 2012-03-05 14:13
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price: $3.00

solution:

body preview (97 words)

x² - xx + 4 = x
xxxxx xxxxxxx

xxxx 3x x x = x² x 2*(3/2)*x x xxxxxxx x (3/2)² + 4
x xxxxxxxxx - xxx + 16/4 x (x-3/2)² + xxx
xxxx the xxxxxxxx is xxxxxxxxxx to xxxxxxxxx x xxx x 0
xxx we xxxxxxxx xxxx xxxx is xxxxxxxxxx xxxxxxx xxxxxxxxx >x x xxx xxx x
xxxx (x-3/2)² x 7/4 >= xxx for xxx x ( xxxx xxxxxxxxx + xxx is xxxxx xxxx )
xxxx xxxx xxxxxxxx has no solution in x ( xxx xx xxxxxx

second method:

xxxxx = b² - xxx x (-3)² x xxxxx
= x - xx x xx
xxxxx xx xxxxxxxx thus xxx xxxxxxxx has no solutions in R


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