-3-x > 4x+7
-4x-x > 7+3
-5x > 10
x < 10:(-5)
x < -2
x∈(-∞;-2)
( 5x^2 - 3 ) - ( 2x +5 ) = 5x^2
5x^2 - 3 - 2x - 5 - 5x^2 = 0
- 2x = 8
X = - 4
<span>1. а) а⁴+ а³ = а²(а²+а) = a</span>³(a+1)<span>
б) 2z⁵ - 4z³ = 2z²(z³-2z) =2z</span>³(z² - 2)<span>
2. а) ax²+3ax= ax(ax+3)
б) xy³+5x²y²-3x²y= xy(y</span>² + 5xy - 3x)
Удачи!
5.8-9.3-4.7+3.2=-3,5-4,7+3,2=-8,2+3,2=-5