dahnibin4 dahnibin4

16-07-2021
Mathematics

contestada

What should be done to x² + 15x in order to create a perfect square?
O add 7.5
O subtract 56.25
subtract 7.5
O add 56.25

Respuesta :

jimrgrant1 jimrgrant1

16-07-2021

Answer:

add 56.25

Step-by-step explanation:

To create a perfect square

add ( half the coefficient of the x- term )²

x² + 2(7.5)x + 7.5²

= x² + 15x + 56.25

= (x + 7.5)² ← a perfect square

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