Answer:
(y - 26)² = 100
Step-by-step explanation:
given
y² = 52y - 576 ( subtract 52y from both sides )
y² - 52y = - 576
to complete the square
add ( half the coefficient of the y- term )² to both sides
y² + 2(- 26)y + 676 = - 576 + 676
(y - 26)² = 100
