при х = -28:
54 - √х² = 54 - √(-28)² = 54 - 28 = 26,
√(25*400) + √(25/100) + √(-16)² =
= √(5²*20²) + √(5²/10²) + √(-16)² =
= 5*20 + 5/10 + 16 =
= 100 + 0,5 + 16 = 116,5,
√300/√3 - √32*√2 + √(5²*2⁴) =
= √(300/3) - √(32*2) + √(5²*4²) =
= √100 - √64 + √(5*4)² =
= √10² - √8² + √20² =
= 10 - 8 + 20 = 22