a)x2-25 igual 0
b)2x2-98 igual 0
a)
x² - 25 = 0
x² = 25
x = ± √25
x = ± 5
S = {-5, 5}
b)
2x² - 98 = 0
2x² = 98
x² = 98 / 2
x² = 49
x = ± √49
x = ± 7
S = {-7, 7}
vai estudar xará;
x² = 25
x1 = -5
x2 = +5
2x² = 98
x² = 49
x1 = -7
x2 = +7
pronto
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Verified answer
a)
x² - 25 = 0
x² = 25
x = ± √25
x = ± 5
S = {-5, 5}
b)
2x² - 98 = 0
2x² = 98
x² = 98 / 2
x² = 49
x = ± √49
x = ± 7
S = {-7, 7}
vai estudar xará;
x² = 25
x1 = -5
x2 = +5
2x² = 98
x² = 49
x1 = -7
x2 = +7
pronto