Question

x equals quantity of negative 7 plus or minus I square root of 6 all over 2

x equals quantity of negative 7 plus or minus I square root of 3 all over 2

x equals quantity of 7 plus or minus I square root of 6 all over 2

x equals quantity of 7 plus or minus I square root of 3 all over 2

Answer 1

Question: Solve x2 - 7x = -13.

Answer 2

The first post is the answers, sorry I had messed up

Answer 3

start with
\[x^2-7x+13=0\] which looks like
\[ax^2+bx+c=0\]with \[a=1,b=-7,c=13\]

Answer 4

then the solution is
\[x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\] with the \(a,b,c\) as above

Answer 5

I don't understand how I would get the answer from that? @satellite73

Answer 6

this is the quadratic formula \[x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\]

Answer 7

where you see an \(a\) put \(1\)
where you see \(b\) put \(-7\)
where you see \(c\) put \(13\)

Answer 8

that is the only way to get the answer

Answer 9

So B?

Answer 10

B is a letter

Answer 11

In my multiple choices I mean lol

Answer 12

\[x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\]
\[x=\frac{-(-7)\pm\sqrt{(-7)^2-4\times 1\times 13}}{2\times 1}\]

Answer 13

so no definitely not B since \(-(-7)=7\)

Answer 14

Im thinking C then?

Answer 15

@satellite73

Answer 16

@satellite73