Предмет: Алгебра, автор: Dana140206

упростите выражения:
(2х-5)^2+20х
36с-3(1+6с)^2
^2 - квадрат.

Ответы

Автор ответа: trscott
2

(2х-5)²+20х = 4x² - 20x + 25 + 20x = 4x² + 25

36с-3(1+6с)² = 36c - 3 - 36c - 36c² = -3(12c²+1)

Dana140206: Спасибо! А можешь ещё решить:
(1-3х)^2
trscott: (1-3х)^2 = 1 - 6x + 9x^2
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