A Number That Must Be Added To X\Xb2- 15x To Make It Perfect Square Trinomial

A number that must be added to x²- 15x to make it perfect square trinomial

 

Answer:

225/4

Step-by-step explanation:

Perfect square trinomial:

ax² + bx + (b/2)²

or

ax² + (b/a)x + (b/a)(1/2)²

Given:

x²- 15x

a = 1

b = -15

x²- 15x + (-15/2)²

x² - 15 + (225/4)


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