Answer:
(3x +2)(x +1)
Step-by-step explanation:
A number of different ways are suggested for doing this. One that seems straightforward is this.
For ax^2 +bx +c, look for factors of ac that total b. Here we have ...
ac = 3·2 = 6
b = 5
It is easy to see that the factors we just multiplied to get 6 are ones that total 5: 3+2 = 5.
Now, rewrite the "bx" term using this sum.
3x^2 +3x +2x +2
Factor each pair of terms.
3x(x +1) +2(x +1)
And factor out the common factor:
(3x +2)(x +1)
5x-2>3
=> 5x > 3+2
=> x > 5/5
=> x > 1
The correct option is: B. 450
<u><em>Explanation</em></u>
Current value of the investment is 
dollars and 30 years ago, the value of the investment was 
dollars.
Suppose, the value of investment today is 
times greater than the value of the investment thirty years ago.
So, the equation will be........
Thus, the value of the investment today is 450 times greater than the value of the investment thirty years ago.
When you square +6 or -6 you get 36. That's less than 40.
When you square +7 or -7, you get 49. That's more than 40.
So one of the square roots of 40 is between <em>+6 and +7</em>, and
the other square root of 40 is between <em>-7 and -6 </em>.
The first option and the third one
