Question

Use the quadratic formula to find the roots of the equation. 2x2 - 28x + 98 = 0
A. {-7, 7}
B. {7}
C. {-2, 49}
D. no real number solution

Answer 1

I think it's either A or B. idk

Answer 2

Try using the quadratic formula:
\[(-B \pm \sqrt (B^2 + 4*A *C)) \over 2*A\]
\[28 \pm \sqrt0 \over 4\]
28/4 = 7
Technically speaking there are two instances of this answer, so it would look like x={7, 7}, but B is the correct answer.

Answer 3

okay thnk u