Answers

2015-07-09T07:16:23+08:00
B^-4ac=10^-4(2)(9)
          =100-72
          =28
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2015-07-09T07:41:28+08:00
X^2+10x+9
(x+9)(x+1) equate to zero
x+9=0    x+2=0 Transpose
x= -9     x= -2
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