Question

2x+x=28

complete the square

Answer 1

is it 2x^2 + x = 28 ????

Answer 2

yeah sorry

Answer 3

i no to divide by two and i got x^2+x/2=56

Answer 4

pls resend the entire question once more as it was given

Answer 5

2x^2+x=28

Answer 6

so you divide by two and get x^2+x/2=14

Answer 7

yes, now you add square of half of the coefficient of x to both sides i. (1/4)^2

x^2 + x/2 + (1/4)^2 = 14 + (1/4)^2

Answer 8

now left hand side becomes (x+ 1/4)^2

so (x + 1/4)^2 = 14 + 1/16

Answer 9

225/16

Answer 10

(x + 1/4)^2 = 225/16
taking squareroot of both sides we get

\[x + 1/4 = \pm \sqrt{225/16}\]

Answer 11

\[x + 14 =\pm \sqrt{225}/\sqrt{16}\]

Answer 12

where did 14 come from

Answer 13

prob forgot to put 1/4 small mistake of his.

Answer 14

soryr made a mistake ....

Answer 15

its ok just got me confused

Answer 16

\[x + 1/4 = \pm \sqrt{225}/\sqrt{16}\]

Answer 17

\[x + 1/4 = \pm15/4\]

Answer 18

\[x = -1/4 \pm15/4\]

Answer 19

so you then get x=-1/4+-15/4

Answer 20

correct and finally

x = -1/4 + 15/4 = 14/4 = 7/2
and
x = -1/4 - 15/4 = -16/4 = -4

Answer 21

so we solved the equation by completing the square...

Answer 22

did u get the method??????