(4d+4b)*(6d-b)
Объяснение:
(5d+b)² - (d-2b)² = (5d+b-(d-2b))*(5d+b+(d-2b) = (5d+b-d+2b)*(5d+b+d-2b) = (4d+3b)*(6d-b) = (4d+4b)*(6d-b)
(4d+4b)*(6d-b)
Объяснение:
(5d+b)² - (d-2b)² = (5d+b-(d-2b))*(5d+b+(d-2b) = (5d+b-d+2b)*(5d+b+d-2b) = (4d+3b)*(6d-b) = (4d+4b)*(6d-b)