if x=2and x=3 are solution of equation 3xsaquare-2mx+2n=0 find value of m amd n
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Here m=15/2 and n=9 is the ans of this question
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anjali242:
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x = {2, 3}
p(x) = 3x² - 2m + 2n = 0
putting x = 2 in p(x)
3(2)² - 2m(2) + 2n = 0
→ 4m - 2n = 12 ....1
putting x = 3 in p(x)
3(3)² - 2m(3) + 2n = 0
→ 6m - 2n = 27 ....2
Subtracting 1 from 2:
6m - 2n = 27
- 4m - 2n = 12
-------------------------
2m = 15
→ m = 7.5
4(7.5) - 2n = 12
→ 30 - 2n = 12
→ 2n = 18
→ n = 9
Answer : m = 7.5 and n = 9
p(x) = 3x² - 2m + 2n = 0
putting x = 2 in p(x)
3(2)² - 2m(2) + 2n = 0
→ 4m - 2n = 12 ....1
putting x = 3 in p(x)
3(3)² - 2m(3) + 2n = 0
→ 6m - 2n = 27 ....2
Subtracting 1 from 2:
6m - 2n = 27
- 4m - 2n = 12
-------------------------
2m = 15
→ m = 7.5
4(7.5) - 2n = 12
→ 30 - 2n = 12
→ 2n = 18
→ n = 9
Answer : m = 7.5 and n = 9
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