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maka √x+√x=2 ⇒ 2√x=2 ⇒ √x= 1 ⇒ x= 1
tnggal masukin ke x²+ x pangkat -2 = 1²+ 1/x² = 1+1 =2
2√x = 2
√x = 1
x = 1
x² + x⁻² = 1 + 1
= 2