It the quadratic equation
36x²+2 kx + 25=0 has
equal roots where k is
positive then what is the
value of the root ?
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Answer:
a=36 , b=2k ,c=25
b²-4ac = (2k) ²-4(36)(25) =0
= 4k² - 36 * 25 =0
= k² - 900 =0
= k² = 900
= k = 30
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