+0

# hard question lol

+1
171
2

the product of my number and twice my number is 72. what is half my number?

off-topic
Guest Jul 14, 2017

#1
+5553
+2

Let's call the number  " n " .

The problem tells us that...

n * 2n  =  72

2n2  =  72              Divide both sides of this equation by  2  .

n2  =  36                Take the  ±  square root of both sides.

n  =  ±√36

n  =  ± 6

So..your number can be either  6  or  -6  .

Half of   6  is    3  .

Half of  -6  is  -3  .

hectictar  Jul 14, 2017
Sort:

#1
+5553
+2

Let's call the number  " n " .

The problem tells us that...

n * 2n  =  72

2n2  =  72              Divide both sides of this equation by  2  .

n2  =  36                Take the  ±  square root of both sides.

n  =  ±√36

n  =  ± 6

So..your number can be either  6  or  -6  .

Half of   6  is    3  .

Half of  -6  is  -3  .

hectictar  Jul 14, 2017
#2
+421
+1

I agree with hectiar

AsadRehman  Jul 14, 2017

### 15 Online Users

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details