YanaseAHotori
YanaseAHotori YanaseAHotori
  • 10-06-2017
  • Mathematics
contestada

What number must be added to the expression below to complete the square? x2 + 5x
a:25
b:25/4
c:5/2
d:5

Respuesta :

mergl
mergl mergl
  • 10-06-2017
Completing the square would be (b/2)^2, where b here is equal to 5. (5/2)^2 would be 25/4, which would be choice B. 
Answer Link
irspow
irspow irspow
  • 10-06-2017
You halve the linear coefficient, square that value, and add it.

In this case the linear coefficient is 5 so:

(5/2)^2

25/4
Answer Link

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