Please URGENT tomorrow exam
If 2x+5 is a factor of 2x^2- k, find k
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2x+5=0
2x=-5
x=-5/2
Putting the value in the equation
2x^2 - k
2(-5/2)^2 - k=0
2(25/4)-k=0
25/2-k=0
k=2/25
2x=-5
x=-5/2
Putting the value in the equation
2x^2 - k
2(-5/2)^2 - k=0
2(25/4)-k=0
25/2-k=0
k=2/25
fanneykhan:
How 25/2 became 2/25
Its 25/2 only
by mistake he would have written
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