Question

Solve. x2 – x – 6 = 0

A.
{3, –2}

B.
{6, –1}

C.
{2, –3}

D.
{–2, –3}

Answer 1

Is there a certain method you have to use?

Answer 2

no

Answer 3

Okay I'll do the factoring way
so x^2 means it'll be (x ) (x)
-x = -1x
and that is the sum of two numbers, and -6 is the product, of those two numbers. 2 and 3 works in this way, -3 + 2 = -1 so you get -x for that and -3 * 2 = -6
so (x +2)(x - 3)
so (2, -3)

Answer 4

Solve. 2x2 + x – 1 = 2

Answer 5

a = 2x2
b = 1x
c = -3

if you do the quadratic formula, it'll be easier in this one. for me, anyway

Answer 6

\[x = \frac{ -b \pm \sqrt{b^2 - 4ac} }{ 2a }\]

Answer 7

so plug in the given values of a, b and c to the formula and you get \[x = \ \frac{ -1 \pm \sqrt{1^2 - 4(2)(-3)}}{ 4 }\]

Answer 8

Jadey I believe they're referring to complete the square >.> it's faster <,<

Answer 9

I know two ways that are faster for me >.<

Answer 10

:o

Answer 11

I already know the answer I was just going to work it out for milbes

Answer 12

Mental Math ♦o♦

Answer 13

Lol it's pretty easy. >.<

Answer 14

If you know it by heart it is <,<

Answer 15

\[x = \frac{ -1 \pm \sqrt{25} }{ 4}\]

Answer 16

Lol

Answer 17

thats what i got then i divided it

Answer 18

Welp... I probably should have done it differently then, it doesn't make sense if it's -1 >.< Boy oh boy i'm out of it, aren't I?

Answer 19

gtg can u explain it fast

Answer 20

@Xmoses1

Answer 21

It's B

Answer 22

Sorry but just trust me on this one, it's definitely B, -1 - 5 = -6
-6 / 4 = -3/2