Решить уровнения :4x⁴-17x²+4=0
X² = A ; A > 0 4A² - 17A + 4 = 0 D = 289 - 64 = 225 √ D = √ 225 = 15 A1 = ( 17 + 15 ) : 8 = 4 A2 = ( 17 - 15 ) : 8 = 0,25 X² = A X1 = + 2 X2 = - 2 X3 = + 0,5 X4 = - 0,5