if one zero of the quadratic polynomial x²+3x+k is 2 then find the value of k
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2
-10 will be the value of K
shiva164:
how?
Answered by
14
Hi ,
Let p( x ) = x² + 3x + k ,
If 2 is the zero of p ( x ) then
p( 2 ) = 0
2² + 3 × 2 + k = 0
4 + 6 + k = 0
10 + k = 0
k = - 10
I hope this helps you.
:)
Let p( x ) = x² + 3x + k ,
If 2 is the zero of p ( x ) then
p( 2 ) = 0
2² + 3 × 2 + k = 0
4 + 6 + k = 0
10 + k = 0
k = - 10
I hope this helps you.
:)
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