<span>5a^3-2ab+6b-(a^3+2ab+2b)=4a^3+8b</span>
<span>5a^3-2ab+6b-a^3+2ab+2b=4a^3+8b</span>
<span>4a^3+8b=4a^3+8b</span>
1) -0,625
2) x= 1
--
2
3)x= 17
--
8
4)2x-10=4x+24
2x-4x=24+10
-2x=34
x=-17
(11х+2у)² = 121х²+ 44ху + 4у²
(30а+40)² = 900а² + 2400а + 1600
(13z-12)² = 169z² - 312z + 144
(0.5n-0.3m)² = 0.25n² - 0.3nm + 0.09m²
((2x-5)^2-(2x-3)(2x+3))=0
4x^2-20x+25-4x^2+9=0
34-20x=0
20x=34
x=1.7