3 years ago

Solve. x^2 - 49 = 0 A) ±49 B) ±12 C) ±7 D) ±6

2 answers:

7 0

(X+7)((x-7)

This is call the difference of squares because there is no middle number and the last number is a square like 7×7 is 49
X+7=0. X-7=0
X=-7. X=7
C

zlopas [31]3 years ago

3 0

The answer is c
x^2 = 49
x = √49
√49 = ±7

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