Answer:
(x-4)² = 44
Step-by-step explanation:
To complete the square, take the middle term -8x and divide the coefficient in 2 and square it. Here it is -8/2 = -4. -4² = 16. Add 16 to both sides.
x² - 8x - 10 = 18
x² - 8x + 16 - 10 = 18 + 16
(x-4)² - 10 = 34
(x-4)² = 44
