64y^2-5y-b=(8y)^2-2*8y*(-b)^(1/2)+((-b)^(1/2))^2
-5y=-2*8y*(-b)^(1/2) =>5=16(-b)(1/2) => 5^2=16^2*(-b)
-b=25/256 =>b=-25/256
Объяснение:
64y^2-5y-b=(8y)^2-2*8y*(-b)^(1/2)+((-b)^(1/2))^2
-5y=-2*8y*(-b)^(1/2) =>5=16(-b)(1/2) => 5^2=16^2*(-b)
-b=25/256 =>b=-25/256
Объяснение: