the value of variable in the equation x+3=o is.
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A movie package can be added to a customer's cable TV service for a cost of $8 per month. How much will the additional Movie package cost for 13 months?
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Given : (k+2)x
2
−kx+6=0
Putting x=3
(k+2)×9−k×3+6=0
9k+18−3k+6=0
6k=−24
k=−4
Putting k=−4 in given equation
−2x
2
+4x+6=0
x
2
−2x−3=0
x
2
−3x+x−3=0
x(x−3)+1(x−3)=0
(x+1)(x−3)=0
x+1=0 or x−3=0
x=−1 or x=3
Other root of the equation, x=−1
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