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21-01-2019
Mathematics

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What number must you add to complete the square x^2+8=-3?

A. 16
B. 8
C. 4
D. 64

Respuesta :

21-01-2019

[tex]x^2 + 8x = -3[/tex]

[tex]x^2 + 8x + (8/2)^2 = -3 + (8/2)^2[/tex]

[tex]x^2 + 8x + 16 = -3 + 16[/tex]

Answer: A 16

[tex](x + 4)^2 = 13[/tex]

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