The constant that can be added to
- 3x to form a perfect square trinomial is 
The given expression is
- 3x
To form a perfect square trinomial

The given expression is
- 3x
first we have to add a constant term with it
- 3x + z
By comparing the given expression and the perfect square trinomial

a = x
Similarly
-2ab = 3x
where know a =x
Then,
-2b = 3
b = -3/2
Similarly

= z
9/4 = z
Convert the simple fraction to mixed fraction
9/4 = 
Hence, the constant that can be added to
- 3x to form a perfect square trinomial is 
The complete question is :
Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?
and 
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Answer:
2x+46
Step-by-step explanation:
-2(x-5)+4(9+x), Multiply
-2x+10+36+4x, Combine like terms
Simplified= 2x+46
192!
you do length times width times height
hope this helps
So you have to decrease £30 by 20%
To do this, an easy way would be to first take away 100% from 20% because you are DECREASING :
100 - 20 = 80
Then divide your answer by 100 :
80 / 100 = 0.8
This means 0.8 is going to be your multiplier so you do
0.8 * 30 = 24
Answer = £24