If k is ratio of zeroes of the polynomial 4x2 – 5x – 3, then the value of is plzz annswer fsast
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Given : k is ratio of zeroes of the polynomial 4x2 – 5x – 3
To find : Value of k
Solution:
Let say zeroes of 4x² – 5x – 3 are α & kα
Sum of zeroes = α + kα = - (-5/4) = 5/4
=> α (1 + k) = 5/4
Squaring both sides
=> α² (1 + k)² = 25/16
product of zeroes = α * kα = - 3/4
=> α²k = - 3/4
α² (1 + k)² / α²k = (25 /16 ) / ( - 3/4)
=> (1 + k)² / k = - 25 / 12
=> 12(k² + 2k + 1) = - 25k
=> 12k² + 24k + 25k + 12 = 0
=> 12k² + 49k + 12 = 0
k = (- 49 ± √49² -4(12)(12) ) / 24
=> k = (- 49 ± √1825 )/24
=> k = (- 49 ± 5√73 )/24
value of k is (- 49 ± 5√73 )/24
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