Question

07.09 Quadratic Formula

Solve using the quadratic formula.
2x2 - 5x – 10 = 0

Answer 1

and exlain how u got it :0

Answer 2

\[x=-b \pm \sqrt{b^2-4ac}/(2a)\]
this is the quadratic formula
So the answer would be
\[5\pm \sqrt{25+80}/4\]
or
x=-1.312 and 3.812

Answer 3

What are the possible number of negative zeros of f(x) = 2x7 – 2x6 + 7x5 – 7x4 – 4x3 + 4x2 ?