## anonymous one year ago Which of the following constants can be added to x^2 - 3x to form a perfect square trinomial? 1 1/2 2 1/4 4 1/2

1. anonymous

Like what I've told earlier, divide the coefficient of x (in this case, it is -3), then once you get the quotient, square it.

2. anonymous

so divide -3 then square it?

3. anonymous

Oops, I forgot to write that you should divide -3 by 2.

4. anonymous

which is 1.5?

5. anonymous

Keep it in fraction, since your choices are in fraction.

6. anonymous

sqrt 1 1/2

7. anonymous

Why is it there a square root? -3 divided by 2 is -3/2.

8. anonymous

Then square it. $\left( -\frac{ 3 }{ 2 } \right)^2$

9. anonymous

divide by 2 then find square root?

10. anonymous

ohh

11. anonymous

Not the square root, but you square it. ^2

12. anonymous

which would just be 1 1/2

13. anonymous

$-\frac{ 3 }{ 2 }\times-\frac{ 3 }{ 2 }=????$

14. anonymous

What is -3 times -3 (numerator)? What is 2 time 2 (denominator)?

15. anonymous

9/4

16. anonymous

= 2 1/4

17. anonymous

Yes. :)