Question

4x²– 4= 0
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Answer 1

4x² - 4 = 0

4x² = 4

x² = 4/4

x² = 1

x = +- √1

x = +- 1

S = {-1, 1}

Answer 2

4x² - 4 = 0

4x² = 4

x² = 4/4

x = + - √1

x' = 1 x'' = - 1