please help me quick man
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Answers
Question :-
- Find the value of m, if one zero of the Polynomial (m² + 4)x² + 65x + 4m is reciprocal of the other ?
Concept used :-
The sum of the roots of the Equation ax² + bx + c = 0 , is given by = (-b/a)
and ,
→ Product of roots of the Equation is given by = c/a.
Solution :-
Let , Zeros of the Given Polynoimal are ɑ & β.
Since One Zeros is reciprocal of the other .
So,
we can say that :-
→ β = 1/ɑ
Or,
→ ɑ = 1/β
or, we can conclude That,
→ ɑ × β = 1. ------------------ Equation ❶
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Now, Comparing The Given Polynomial (m² + 4)x² + 65x + 4m with ax² + bx + c , we get,
→ a = (m² + 4)
→ b = 65
→ c = 4m .
So,
➼ Product of Zeros = c/a
➼ Product of Zeros = 4m/(m² + 4) ------ Equation ❷
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Putting Equation ❶ = Equation ❷, we get,
☛ 1 = 4m / (m² + 4)
☛ m² + 4 = 4m
☛ m² - 4m + 4 = 0
☛ m² - 2m - 2m + 4 = 0
☛ m(m - 2) -2(m - 2) = 0
☛ (m - 2)(m - 2) = 0
☛ (m - 2)² = 0
Putting Equal to Zero,
☛ m = 2 (Ans.)
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Find the value of m, if one zero of the polynomial (m²+4)x²+65x+4m is reciprocal of the other.
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- zero of the polynomial is reciprocal of the other one
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- value of m
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Let the zeros of polynomial be P & Q
as we know, one zero is reciprocal of the other
We can say that
↪p = 1/q
↪q = 1/p
Or,
p × q = 1 ____(EQ.1)
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By comparing the polynomial we get,
➡a = (m²+4)
➡b = 65
➡c = 4 m
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Then,
⏭ Products of zero = c/a
⏭ Products of zero = 4m/(m²+4) _____(EQ.2)
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Now, comparing both equations...
▶1=4m/(m²+4)
▶m² +4 = 4m
▶m²-4m +4 = 0
▶m(m-2)-2(m-2) = 0
▶(m-2)(m-2) = 0
▶(m-2)² = 0