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4x² + 4x +1 = 0
(2x+1)(2x+1) = 0
x = -1/2 ∨ x = -1/2
2.)
x² -x + 1/4 = 0
(x-1/2) (x-1/2 ) = 0
x = 1/2 ∨ x = 1/2
Maaf kalau salah
4 + 4x = -1
+x+=+
= 0
= +/-
= +/- 0
x = +/- 0 -
maksudnya +/- itu kurang atau lebih ya