а) (-4)(-4 -5) - (-5)(-4 + 5) = 20 + 5 = 25б) 8(-0.3) + 3 - 9(-0.3) - 7 + 5 + 0.3 = -2.4 + 3 + 2.7 - 7 + 5 + 0.3 = 1.6в) 3(-2d - 3) + 3(2 - d) = -6d -9 + 6 - 3d = -9d - 3г) 3b - 2(a - b) + a - 5(a + b) = 3b - 2a + 2b + a - 5a - 5b = -4a - b
а) (-4)(-4 -5) - (-5)(-4 + 5) = 20 + 5 = 25
б) 8(-0.3) + 3 - 9(-0.3) - 7 + 5 + 0.3 = -2.4 + 3 + 2.7 - 7 + 5 + 0.3 = 1.6
в) 3(-2d - 3) + 3(2 - d) = -6d -9 + 6 - 3d = -9d - 3
г) 3b - 2(a - b) + a - 5(a + b) = 3b - 2a + 2b + a - 5a - 5b = -4a - b