Question

Solve x2 + 10x + 7 = 0 by completing the square.
Which equation is used in the process?
x + 10)2 = 93
(x + 5)2 = 32
(x + 5)2 = 18

Answer 1

\[x^2+10x=-7\]\[x^2+10x+25=-7+25\]\[(x+5)^2=18\]

Answer 2

Thanks!

Answer 3

You are surely welcome! But do you understand what I did?

Answer 4

Somewhat where did the 25 come from?

Answer 5

to complete the square you add \[(10/2)^2\] or in the form ax^2+bx+c
(b/2)^2=c

Answer 6

Do you understand?