Y = 6x - 7 - линейная функция
k = 6 > 0 => функция возрастает
f(x) = 0 => 6x - 7 =0 => x = 1 1/6f(x)< 0 => 6x - 7 < 0 => x< 1 1/6f(x) > 0 => 6x - 7 > 0 => x > 1 1/6
X²+8x+16 = (x+4)²
(x-1)(x+4)² - 6(x+4) = 0
(x+4)*((x-1)(x+4)-6) = 0
<u>x1 = -4</u>
x²+3x-4-6 = 0
x²+3x-10 = 0
по т.Виета корни (-5) и (2)
х2 = -5
х3 = 2
................................................
7(3a+4y)
4c²(1-3c³)
m²n²(m-n)
9p(p³-2p-3)