Question

equaçao x²=a a)x²=a b)x²=9 c)4x²=16

Answer 1

a) x² = a
    x = $\sqrt{a}$

b) x² = 9
    x = $\sqrt{9} =3$

c)4x² = 16
x² = $\frac{16}{4}$
x² = 4
x =$\sqrt{4}$
x = 2

Answer 2

x² = a
x = +/-√a

x1 = √a      x2 = - √a


x² = 9
x = +/- √9

x1 = 3         x2 = -3

4x² = 16
x² = 16/4
x² = 4
x = +/-√4

x1 = 4         x2 = -4

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