Question

Explain how to solve x^2 + 8x by completing the square.

Answer 1

an equation of the type ax^2+bx
to solve it add and subtract (-1/2)*Coefficient of x to this equation

Answer 2

x^2+8x+16-16
(x+4)^2-16

Answer 3

wait you added 16 and then took it out?

Answer 4

ya...........you need to add as well as subtract

Answer 5

then what happens to the 8x?

Answer 6

see -(1/2) *coefficient of x
-(1/2)*(8)
-4
square it
16
add and subtract to the given equation
ie. x^+8x+16-16
(x^2+8x+16)-16
(x+4)^2-16