Question

Complete the square to form a perfect square trinomial.

x² + 4x + __

Answer 1

how?

Answer 2

Take the middle term and divide it by 2. And then square it (^2). You'll get your last term.

Answer 3

thatll work ;)

Answer 4

another trick is to factor it:

(x)(x+4) and take that last number and spread it evenly between the two

(x+2)(x+2)

Answer 5

How would you factor x^2+4x+4?

Answer 6

Yup!

Answer 7

is it 9?

Answer 8

4/2 = 2

2^2 = 4.

So: x² + 4x +4

Answer 9

i see