Log(3)(6x+3)≤2
{6x+3>0⇒6x>-3⇒x>-0,5
{6x+3≤9⇒6x≤6⇒x≤1
x∈(-0,5;1]
A) (p+q+r) * (p+q-r) = p² + q² - r²;
Б) (x+1) * (x+2) * (x+3) = (x² + 2x + x + 2) * (x + 3) = (x² + 3x + 2) * (x + 3) = x³ + 3x³ + 3x³ + 9x + 2x + 6 = 7x³ + 11x + 6;
В) (m-5)*(m-3) + (4-m)² = m² - 3m - 5m + 15 + 16 - 8m + m² = 2m² - 16m + 31
8) 2аb²*(-5ab³) = -10a²b⁵
9) 8bc⁶ / 10b²c³ = 0.8 b⁻¹c³