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Chapter - Quadratic Equation (DPP-1), Objective Section, 1. Which of the following equations has 2 as a root?, a.x?-4x+5=0, b.x? 4+ 3x-12=0, ©. 2x? -7x+6=0, d. 3x? -6x-2=0, , 1 5, 2. ifs is a root of the equation x? + kx — i” 0, then the value of k is, , a2 b. —2, 1 1, od d. 2, 3. Values of k for which the quadratic equation 2x* — kx + k = 0 has equal roots is:, a. 0 only b.4, c. 8 only d. 0,8, , 4. The quadratic equation 2x? — ¥5x + 1 = 0 has, a. two distinct real roots, b. two equal real roots, c. no real roots, d. more than 2 real roots, 5. Which of the following equations has no real roots?, a.x? — 4x +3v2=0, b. x? — 4x — 3V2 = 0, c.x? — 4x — 3y2 =0, d.x* + 4x + 3V2 =0, , Subjective Section, , 6. A train travels 360 km at a uniform speed. In the speed had been 5 km/hr more, it would have, taken 1 hour less for the same journey. Find the speed of the train., , (CBSE 2019), , 7. \f Zeba were younger by 5 years than what she really is, then the square of her age (in years), would have been 11 more than five times her actual age. What is her age now?, , 8. Aand B working together can do a work in 6 days. if a takes 5 days less than B to finish the work in, how many days can B can do the work alone?, , 9. Find two consecutive odd natural numbers, the sum of whose squares is 394., , [CBSE 2017], , 1 3x49, 2x43 * Gema)(axta), , x #3, -3/2, , 10.Solve for x: 0.