I. x2 + 91 = 20x
II. 10y2 - 29y + 21 = 0
I. x2 + 91 = 20x => x2 - 20x + 91 = 0 => x2 - 13x - 7x + 91 = 0 =>x(x - 13) - 7(x - 13) = 0 => (x - 13) (x - 7) = 0 => x = 13, 7 II. 10y2 - 29y + 21 = 0 => 10y2 - 14y - 15y + 21 = 0 => 2y(5y - 7) - 3(5y - 7) = 0 => (5y - 7) (2y - 3) = 0 => y = 7/5, 3/2 Hence, x > y. Alternate Method: if signs of quadratic equation is - ve and +ve respectively then the roots of equation will be +ve and +ve. So, roots of first equation = x = 13, 7 So, roots of second equation = y = 7/5, 3/2 After comparing we can conclude that x > y.
Match Column I and Column II and choose the correct match from the given choice
Column (1) | Directions: Choose the combination that completes the sentences. Match Column I and Column II and choose the correct match from the given choices Column (1) Column (2) (A) ChildLine has been in operation (D) the scheme is not yet available. (B) It has functione... Match Column I and Column II and choose the correct match from the given choice
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