berarti
# y² = 4
y = √4
y = -2 atau 2
# 9x² = 16
x² = 16/9
x = √(16/9)
x = -4/3 atau 4/3
# 16x² = 49
x² = 49/16
x = √(49/16)
x = -7/4 atau 7/4
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berarti
# y² = 4
y = √4
y = -2 atau 2
# 9x² = 16
x² = 16/9
x = √(16/9)
x = -4/3 atau 4/3
# 16x² = 49
x² = 49/16
x = √(49/16)
x = -7/4 atau 7/4