Ответ:
Объяснение:
а) 8b + 12b - 21b + b = b(8 + 12 - 21 + 1) = 0b = 0.
б) -13c + 12c + 40c - 18c = c(-13 + 12 + 40 - 18) = 21c
в) 10a - a - b + 7b = a(10 - 1) + b(-1 + 7) = 9a + 6b = 3(3a + 2b)
г) -15c - 15a + 8a + 4c = a(-15 + 8) + c(-15 + 4) = -7a - 11c
д) 0.3x + 1.6y - 0.3x - 0.4y = x(0.3 - 0.3) + y(1.6 - 0.4) = 0x + 1.2y = 1.2y
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Answers & Comments
Ответ:
Объяснение:
а) 8b + 12b - 21b + b = b(8 + 12 - 21 + 1) = 0b = 0.
б) -13c + 12c + 40c - 18c = c(-13 + 12 + 40 - 18) = 21c
в) 10a - a - b + 7b = a(10 - 1) + b(-1 + 7) = 9a + 6b = 3(3a + 2b)
г) -15c - 15a + 8a + 4c = a(-15 + 8) + c(-15 + 4) = -7a - 11c
д) 0.3x + 1.6y - 0.3x - 0.4y = x(0.3 - 0.3) + y(1.6 - 0.4) = 0x + 1.2y = 1.2y