<span>(x+5)² = x</span>² + 10x + 25<span>
(2+y)² = 4 + 4y + y</span>²<span>
(p+a)² = p</span>² + 2pa + a²<span>
(a-2)² = a</span>² - 4a + 4<span>
(6-c)² = 36 - 12c + c</span>²<span>
(x-12)² = x</span>² - 24x + 144<span>
(5-a)² = 25 - 10a + a</span>²<span>
(2x+9)² = 4x</span>² + 36x + 81<span>
(4x+y)² = 16x</span>² + 8xy + y²<span>
(7m-3n)² = 49m</span>² - 42mn + 9n²<span>
(6y-1)² = 36y</span>² - 12y + 1<span>
(a²-1)² = a</span>⁴ - 2a² + 1<span>
(b+c³)² = b</span>² + 2bc³ + c⁶<span>
(-3x+a)² = 9x</span>² - 6xa + a²
1) 0,65*3,4=2,21
2) 45,25:25=1,81
3) 2,21+1,81=4,02
1)792/36=22(кг)-в первой коробки
2)22*8=176(кг)-продали до обеда