3.5a²b³a³b⁴c*(-2/7)abc³ = 3.5 * (-2/7) * a²a³a * b³b⁴b * cc³ =<span>-a⁶b⁸c⁴
</span>1) 3.5x³ - 2.5x³ = 0.5x³(7 - 5) = 0.5x³ * 2 = x³
2) 1/7ab + 2/3ab = ab(1/7 + 2/3) = ab(3/21 + 14/21) = ab * 17/21 = (17/21)ab
y=x^2+4x+4 ,x(знак пренадлежит)R
Перпендикулярны, если а•в=0;
-8•(3м+1)+9•4=0;
-24м-8+36=0
-24м=-28;
м=28/24;
При м=1 1/6
<span>(a+1) (a+2) (a-3)-a (a-4)+5=а</span>³-3а²+3а²-9а+2а-6-а²+4а+5=а³-а²-3а-1