Question

what number must you add to complete the square?

x^2+2x=13

A. 2
B. 1
C. 3
D. 4

Answer 1

I'll tag some cool users that can help you

Answer 2

mkay thanks

Answer 3

@dan815 @AlexandervonHumboldt2 @Nnesha

Answer 4

You're welcome! c;

Answer 5

x^2+2x=13
balance the equation
we need to add (b/2)^2 to bht sides in order to complete the square (or to create the perfect square trinomial

Answer 6

\[\rm Ax^2+Bx+C=0\]
this is a quadratic equation where b is the coefficient of x term

Answer 7

both**

Answer 8

i still don't understand... o.o

Answer 9

well
these are steps for`completing the square`
1) move the constant term to the other side of the equation
2) divide all terms by leading coefficient
3) complete the square by adding (b/2)^2 both sides

Answer 10

i got it. its 1

Answer 11

as you can see x^2+2x=13
constant term is already at the right side and leading coefficient is one
now just add (b/2)^2 both side (take half of x coefficient and then square it )

Answer 12

i have another question..

solve this quadratic equation by completing the square. x2+2x=20

x=1 plus or minus square root of 24
x=-1 plus or minus square root of 24
x=-1 plus or minus square root of 21
x=1 plus or minus square root of 21

Answer 13

same steps how would you complete the square ? balance the equation by adding (b/2)^2 both sides