Question

Solve. x2 + 10x = –2

Answer 1

is that x^2?

Answer 2

Yes

Answer 3

put the equation in the form:\[ax ^{2} + bx + c = 0\]and then solve using the quadratic formula:\[x = \frac{ -b \pm \sqrt{b ^{2} - 4ac} }{ 2a }\]Your equation re-written looks like:

x^2 + 10x + 2 = 0

Answer 4

My choices are:

A. -5 +/- 2√2
B. -5 +/- 3√3
C. -5 +/- √7
D. -5 +/- √23

Answer 5

So, a=1, b=10, and c=2. Substitute and simplify.

Answer 6

i will try, but im doing it on paper because its easier to work out on there

Answer 7

i got -10 +/- √92 all over 2

Answer 8

You are on the right track. That accounts for substitution. Now just simplify.

Answer 9

It's D

Answer 10

because 4 is the greatest perfect square in 92

Answer 11

If you don't show your work, then I can't tell you whether your answer is correct or not.

Answer 12

92 divided by 4 is 23

Answer 13

i did but it's on paper and will take a while to type out on here

Answer 14

ok, yes, it's D.

Answer 15

thanks for the help, i actually learned how to do it instead of just getting the answer

Answer 16

That's the important thing. Because then, you'll be able to do these on your own.

Answer 17

and you're very welcome. Thanks for the recognition and good luck to you @alassen