Tolong bantu jawab ya no 2dan 3

#2
4x² + 2x - 1 = 0
4x² + 2x = 1
x² + 2/4x = 1/4
x² + 2/4x + 1/16 = 1/4 + 1/16
(x + 1/4)² = 5/16
x + 1/4 = √5/16
x = (-1 +/- √5)/4

#3
= 100/40 x 26 cm²
= 10/4 x 26 cm²
= 260 cm²/4
= 65 cm²

Jadikan terbaik ya, makasih