49y²-64=0
(7y-8)(7y+8)=0
x1= 8/7, x2= -8/7
49y² - 64 = 0
49y² = 64
y₁ = - 8/7
y₂ = 8/7
Ответ: y₁ ≈ -1,14286, y₂ ≈ 1,14286
x+1/2=√0,5| - 0,5
х+0.5=√(0.5)-0.5
х=√(0.5)-0.5-0.5=√(0.5) -1