browndaisha9 browndaisha9

12-04-2017
Mathematics

contestada

Solve
x2 - 49 = 0

A) ±49
B) ±12
C) ±7
D) ±6

Respuesta :

essembly essembly

12-04-2017

C, x = +-7. Difference of squares

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Аноним Аноним

12-04-2017

x2 - 49 = 0 factor this:0
(x + 7)(x - 7) = 0

x = +/- 7

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