How to enlarge by scale factor 1.5 or 2

2) If the scale factor is 2, draw a line from the centre of enlargement, through each vertex, which is twice as long as the length you measured. If the scale factor is 3, draw lines which are three times as long. If the scale factor is 1/2, draw lines which are 1/2 as long, etc. The centre of enlargement is marked.

Step-by-step explanation:

You multiply the dimensions given by the scale factor.

Step-by-step explanation:

ex: if the dimensions are all 5 then u would multiply these dimensions by each scale factor seperately like so, 1.5*5 and then 5*2

Hope this helps!!

The  number 4 must add to complete the square

(x + 2)^2 = 11

Step-by-step explanation:

The given quadratic equation is, x^2 + 4x = 7

For completing square,

We have to add square of half of the coefficient of x.

Here coefficient of x is 4

Half of coefficient of x = 4/2 = 2

Square of half of coefficient of x = 2^2 = 4

We have to add 4 on both side

Therefore the answer is 4

Factoring  x^2 + 4x = 7

Add 4 on both side we get,

x^2 + 4x  + 4 = 7 + 4

(x + 2)^2 = 11