Question

How do I solve this?
Which of the following is a solution of x2 + 5x = -2?

Answer 1

solved a quadratic equation before ?

know about quadratic formula ?

Answer 2

Yes and yes :)

Answer 3

so,
you know you need
a,b,c values
what did you get them as ?

Answer 4

a=2 b=5 and c=-2?

Answer 5

almost correct! :P
but the form is
\( ax^2 +bx+c = 0 \)

so try again for 'c' value

a,b are correct :)

Answer 6

actually 'a' is also incorrect

Answer 7

So would a=1 and c=0?

Answer 8

a=1 yes

x^2 +5x+2 =0

c= 2

makes sense ?

Answer 9

Ohh okay I see, yes :)

Answer 10

have the formula with you?
start plugging in! :)

Answer 11

Okay so -5 is on the outside and 5^2 -4 (1)(2) over 2 is under the square root sign?

Answer 12

go on

Answer 13

what is 5^2 - 4(1)(2) =... ?

Answer 14

Do you multiply the 1 and 2 by -4?

Answer 15

yes

Answer 16

So 25-8?

Answer 17

correct

Answer 18

So now do I find the square root of 17 and divide it by 2 or is that the answer?

Answer 19

you're done

^^ final answer :)