Question

What are the approximate solutions of 2x² – x + 10 = 0?

–2, 2.5

–1.97, 2.47

–2.5, 2

There is no solution.

Answer 1

You'll need to use the quadratic formula:
\[x=-b \pm \sqrt{b^2 - 4ac} /2a\].
First insert the a, b, and c values from the problem (Based on: \[Ax^2+Bx+C=0\] )
Then plug in everything and then divide by 2a, as indicated by the formula.
This will give you both x values. Note that you will add negative b the first time, and then subtract -b due to the \[\pm\] sign.