Question

Which of the following is a solution of x2 + 6x = -22?

Answer 1

do you mean 2x?

Answer 2

no, it is x2, as in 1x^2

Answer 3

OH ok

Answer 4

the answer isn't pretty, so you'll have to use the quadratic formula, do you know it?

Answer 5

-b =/- sqrt\[-b \pm \sqrt{-b^2-4ac }\]

Answer 6

divided by 2a

Answer 7

@pking8786

Answer 8

@sidsiddhartha
@hackworthaustin123

Answer 9

That's the one, and the coefficients are ax^2 + bx+c

so \[-6\pm \sqrt{36-(4*1*22)}/2a \]

Answer 10

I've just worked it out, and are you sure you've not got a sign wrong/ because the one you gave doesn't have a solution. had it been +22 (thus making x2+6x-22=0) then you would have some answers

Answer 11

-3 ± i
-3 ± i
-6 ± i
-6 ± i

Answer 12

@micahm @midhun.madhu1987

Answer 13

Ok so we have to find 2 numbers that multiply to 5 and add to -6. Since 5 is prime, only factors are 1 and 5. Now we set the parentheses up:
( )( ) = 0 Since we know that its x^2, simply just put an x in front of both parentheses's.
(x )(x ) = 0 Ok and since the two factors have to add to -6, only 2 negatives can do that and we know that the last 2 numbers are -5 and -1 now since it has to add to -6 and multiply to 5. (Negative + negative = negative still so that works. Negative * Negative = positive. That works.)
So now you get:
(x-5)(x-1) = 0
Solve for x now:
x = 5 or 1

Answer 14

@micahm its AskingAlex, just my old account, lost my password for the other one

Answer 15

Substitute and find the value of x.