Respuesta:
1. x² - 49 = 0
(x + 7) (x - 7) =0
2. 3x² = 75
3x² - 75 = 0
3 (x² - 25) = 0
3 (x + 5) (x - 5) = 0
3. 10x² - 40 = 0
10 (x² - 4) = 0
10 (x + 2) (x - 2) =0
4.
2x² - 18 = 0
2 (x² - 9) = 0
2 (x + 3) (x - 3) = 0
5.
x² = 121
x = √121
x = 11; Un lado mide 11 m
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Respuesta:
1. x² - 49 = 0
(x + 7) (x - 7) =0
2. 3x² = 75
3x² - 75 = 0
3 (x² - 25) = 0
3 (x + 5) (x - 5) = 0
3. 10x² - 40 = 0
10 (x² - 4) = 0
10 (x + 2) (x - 2) =0
4.
2x² - 18 = 0
2 (x² - 9) = 0
2 (x + 3) (x - 3) = 0
5.
x² = 121
x = √121
x = 11; Un lado mide 11 m