Simplify
2x + 7y + 3x - 4y
a. 5x + 11y
b. 5x + 3y
c. 8xy
d. 5x - 11y
i did the question i'm so sorry : '(

We are given the quadratic function:

The vertex form is given by:

So we have to convert our quadratic form into this vertex form.

We can do so by applying factoring by completing the square method.

Step 1:

We take half of coefficient of x and add it to x.

Coefficient of x is 14, half of it is 7.

(x+7)²

Step 2:

Subtract square of 7 that is 49,

(x+7)²-49+40

(x+7)²-9

The vertex form is given by: