Question

solve by completing the square 12x^2+25x=7

Answer 1

Hi this is the first time on this site, I am desperate on learning it

Answer 2

\(12(x^2+\frac{25}{12}x)=7\)
\(12(x^2+\frac{25}{12}x)+12\cdot (25/24)^2=7+12\cdot(25/24)^2\)
\(12(x+(25/24) )^2=7+12\cdot(25/24)^2\)
\((x+(25/24))^2=(7/12)+(25/24)^2\)
you can continue from there :)

Answer 3

12x^2 25x 7
------ + ---- = ---
12 12 12

25x 25 7 25
x^2 + ---- + ---- = --- + ----
(12)2 12 12 24

(x+25/24)^2=13/8
x+25/24 = sqrt(13/8)
x=sqrt(13/8)-25/24 you can use calculator

Answer 4

hope that helps and simplify further what has watchmath had started up in there

Answer 5

dlugo did you understand the solution here?

Answer 6

oooops here is a better one....

12x^2 25x 7
------ + ---- = ---
12 12 12

25x 25 7 25
x^2 + ---- + ---- = --- + ----
12 2*12 12 24
(x+25/24)^2=13/8 x+25/24
= sqrt(13/8)
x=sqrt(13/8)-25/24 you can use calculator