(-10а²+6а³+3а)-(6а³-4а+8а²)
5-3у-(4-2у)=у-8-(у-1)
7×(2y²-5y-3)-4(3y2-9y-5)
(x+a)×(x+b)=x²+(a+b)×+ab
260
436
Ответы на вопрос:
3(2x+y)-26 = 3x-2y3*2x+3y-26 = 3x-2y-26 + 3y + 6x = 3x-2y-26 + 3y + 6x = -2y + 3x3y + 6x = 26 - 2y + 3x5y + 6x = 26 + 3xx = 26 + 3x / ((5y + 6x)/x)x = 26/3 - 5y/3 15-(x-3y) = 2x+515-x+3y = 2x+515 - x + 3y = 2x+5-x + 3y = -10 + 2x-3x + 3y = -10x = -10 / + 3y)/x)x = 10/3 + y
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