Engineering Board Exam Reviewer · Quadratic Equations · easy
Solve x2-5x-14=0.
- x=7 or x=-2
- x=-7 or x=2
- x=7 or x=2
- x=-7 or x=-2
Answer
A. x=7 or x=-2
Solution
Factor: (x-7)(x+2)=0, so x=7 or x=-2.
More Quadratic Equations questions
- Find the sum of all real solutions of sqrt(2x-1)-sqrt(x-1)=1.
- If one root of ax2+bx+c=0 is twice the other, which relation among the coefficients must hold?
- A ball is thrown upward and its height is h=40t-5t2 meters after t seconds. At what time is it 60 m high while coming down?
- A rectangular garden has a perimeter of 60 m and an area of 216 m2. Find the length of its longer side.
- Solve x4-13x2+36=0.
- Find the quadratic equation whose roots are 23 and - 34.
- For what values of k does x2+kx+16=0 have equal roots?
- If and are the roots of 3x2-7x+2=0, find 2+ 2.
- Find the discriminant of 2x2-3x+5=0.