Question

m2 + m -2=0
Show work please
Solve in quadratic form

Answer 1

Answer:

Step-by-step explanation:

The quadratic formula is a bit tedious for this since it factors so easily, but if that's what you're told to do, you should probably do it!

The quadratic formula is as follows:

$x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}$

For us, a = 1, b = 1, c = -2:

$x=\frac{-1+/-\sqrt{1^2-4(1)(-2)} }{2(1)}$  which simplifies to

$x=\frac{-1+/-\sqrt{1+8} }{2}$  which simplifies a bit more to

$x=\frac{-1+/-\sqrt{9} }{2}$  which gives you the 2 solutions of

$x=\frac{-1+3}{2}=1$  and

$x=\frac{-1-3}{2}=-2$