Question

use the descriminant to determine how many real roots each has.
4x^2-28x+49=0

Answer 1

1

Answer 2

can you show me how you got your answer

Answer 3

a miracle occurs and when you compute
\[b^2-4ac=(-28)^2-4\times 4\times 49=0\]meaning
a) one real root and
b) you have a perfect square

Answer 4

it is
\[(2x-7)^2\]

Answer 5

thank you