Question

Solve this quadratic equation using the quadratic formula.

2x2 - 10x + 7 = 0

Answer 1

\[\frac{ -10\sqrt{-10^{2}-4(2)(7)} }{ 2(2) }\]

Answer 2

is this right?

Answer 3

Almost...

Answer 4

The quadratic formula is

\(\sf\LARGE x=\frac{ -b\pm \sqrt{b^2-4ac}}{2a}\)

where the equation is:
\(\sf\Large ax^2+bx+c=0\)

Answer 5

Remember, your b is negative and we are doing -B in the first part.

So you should get \(\sf -(-10)\)

Answer 6

\[\frac{ 10\pm \sqrt{-10^{2}-4(2)(7)} }{ 2(2) }\]
so like that maybe

Answer 7

correct

Answer 8

but just remember it's \(\sf (-10)^2\) not \(\sf -(10^2)\)

Answer 9

ok thanks :)