rachelivy22 rachelivy22

30-03-2022
Mathematics

contestada

What number must you add to complete the square?
x2 + 6x = 15
A. 12
B. 9
C. 6
D. 3

Respuesta :

jimrgrant1 jimrgrant1

30-03-2022

Answer:

B

Step-by-step explanation:

x² + 6x = 15

to complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(3)x + 9 = 15 + 9

(x + 3)² = 24

thus 9 is added to complete the square

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