Question

resolva as equações a) x² - 49 = 0
b) x² = 1
c) 2x² - 50 = 0

Answer 1

a-) x² = 49
x = √49
x = (+ -) 7
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b-)
x² = 1
x = √1
x = (+ - ) 1
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2x² - 50 = 0
2x² = 50
x² = 50/2
x² = 25
x = √25
x = (+ -) 5

Answer 2

x=√1 ⇨ x=1
2x²=50
x²=50/2
x²=25
x= √25
x=5