What value of c makes the trinomial below a perfect square? x^2+9x+c

Step-by-step explanation:

In order to calculate this you just have to rememer the quadratic formula:

So we know that 2ab=9x, if we clear that ecuation we can solve the value for b:

And now we know that b=9/2 and to complete the perfect square we just multiply to the square:

7. d. 64

8. i. 32

9. c. 125

10. j. none of the above

11. d. 81

12. i. 216

13. e. none of the above

14. g. 240

15. e. none of the above

16. g. 32

17.   e. none of the above

yes

step-by-step explanation: