Solving a Quadratic Equation Using Formula
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Solve the following quadratic equation using quadratic formula .
9x2−9(a+b)x+(2a2+5ab+2b2)=0
The roots are 2a+b3 and a+2b3
The roots are 5a+b3 and a+2b3
The roots are 2a+b3 and a−2b4
The roots are 2a+b3 and a−2b3
Taylor purchased a rectangular plot of area 634 m2. The length of the plot is 2 m more than thrice its breadth. The length and breadth respectively is _____ (approximate values).
34.6 m & 11.20 m
88 m & 24 m
32 m & 16 m
44.6 m & 14.20 m
- x2−6x+9=0
- x2−2x+1=0
- x2−4x+4=0
- x2+2x+1=0
- x=−b±√b2−4ac2
- x=−b−√b2−4ac4a
- x=−b+√b2−4ac4a
- x=−b±√b2−4ac2a
- -3 and -4
- 4 and 3
- -3 and 2
- 2 and -4
- 0 and -8
- 1 and 3
- 0 and 6
- 3 or -3
- 4 or -4
- 5 or -5
- 6 or -6
Find the roots of the quadratic equation, 3x2 – 5x + 2 = 0, using quadratic formula.
(5±1)6
(5±2)6
(4±1)6
(7±1)6
A plane left 30 minutes later than the scheduled time and in order to reach its destination 1500 km away in time it has to increase its speed by 250 km/hr from its usual speed. Find its usual speed.
650 km/hr
950 km/hr
850 km/hr
750 km/hr