42a⁴b - 28a³b² - 70a⁵b³ = 14a³b(3a - 2b - 5a²b²)
{y1 = kx1 + b,
{y2 = kx2 + b;
{-12 = b,
{0 = -3k + b;
{b = -12,
{k = -4
y = -4x - 12
1). (-0,3)*(-5)*mn=1,5mn; 2). (-3)*2*(-1)*abc=6abc.
-2y= 12-6х2у =6х-12у = (6х-12) /2у = 3х - 6у = kx +mk = 3m = -6<span>
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