Question

Solve x2 + 10x + 7 = 0 by completing the square.

Which equation is used in the process?

Answer 1

a^2+2ab+c^2 .... so now here 2ab=2*5*1 and now link a which is 1 so be is 5 so add some to make 7 to 25 add 18 both sides then (x+5)^2 you will get (x+5)^2=18

Answer 2

do u understand the meaning here

Answer 3

The correct procedure for "completing the square" is as follows:
fir shift the constant to the other side
x^2 + 10x = -7
Now add the square of half of the coefficient of x to both sides
here coefficient of x is 10, its half is 5, so add 5^2 to both sides

x^2 + 10x + 5^2 = -7 + 5^2
Now LHS become (x+5)^2, so we can write
(x+5)^2 = -7 + 25
taking root of both sides
x+5 = +/-root(18)
x = -5 +/- 3root2
x = -5 + 3root2 or x = -5 - 3root2


this is the full n proper solution....

Answer 4

yea but theres no need for value of x ... good way to explain

Answer 5

thanks vinit :)

the question said "solve by completing the square" so i guess we have to find values of x....

What do you say ????

Answer 6

completing the square not finding the value of x ??

Answer 7

what do u do when u "solve" an equation???

Answer 8

By the way vinit, r u frm Maharashtra?????

Answer 9

solve for wat u hav to solve if they ask u to write a then write a not abcd ... u kno dnt mind kid its ok may be ur right k newazz explanation i like it