Today, we will start with perfect square trinomials and The quadratic Formula

First : Perfect Square Trinomials

I will help you know more about that with first example :

We have already discussed perfect square trinomials:

We know : : Square of first term of binomial

2ab : twice the product of binomial’s first and last terms

: Square of last term of binomial

Let’s start with example :

Factor :

Like my way, i always try the last term the numbers multiply together to get it like this :

36×1

18×2

12×3

9×4

6×6

I will choose 6×6 because if they multiply together, i will get 36 and when they add together, i will get 12 like the exercise i gave above.

You can do it faster than my way with perfect square.

Answer: (x+6)(x+6) or

Example 2 :

The leading coefficient is not 1 (). Its 9 but Both and 1 are perfect squares, and 6x is twice the product of 3x and 1.

So we will know a = 3a and b = 1.

Then get the answer : or (3x-1)(3x-1)

Quadratic Formula : We will use this formula when we can not use Factoring and Binomial with complicated exercise. This formula will help us get answer easier and faster.

And now let’s start :

We knew : a=2

b=6

c=9

We will apply this formula :