If 2 and 3 are zeroes of polynomial 3x2 – 2kx + 2m. Find the value of k and m.
As 2 and 3 are zeroes of equation 3x2 – 2kx + 2m we will get 0 when we substitute x by 2 and 3
Let us substitute x = 2
⇒ 3(2)2 – 2k(2) + 2m = 0
⇒ 12 – 4k + 2m = 0
Divide whole equation by 2
⇒ 6 – 2k + m = 0
⇒ m = 2k – 6 …(i)
Now substitute x = 3
⇒ 3(3)2 – 2k(3) + 2m = 0
⇒ 27 – 6k + 2m = 0
Substitute value of m from equation (i)
⇒ 27 – 6k + 2(2k – 6) = 0
⇒ 27 – 6k + 4k – 12 = 0
⇒ 15 – 2k = 0
⇒ 2k = 15
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Put value of k in (i)
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⇒ m = 15 – 6
⇒ m = 9
Hence
and m = 9
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