1) -5,37+4,37=-1
2)-1+9,29=8,29
Ctg(360+a<span>)=-ctga
</span>Tg(270<span>+a)=-ctga
</span>
1) 598*985=589030
2) 597*985= 588045
3) 589030-588045= 985
4) 985+597015=598000
2xV3 = 1
2x = V3
4x^2 = 3
X^2 = 3/4
X1 = 0,5V3
X2 = - 0,5V3
Объяснение:
1) x² + 10x - 24 = x² + 10x + 25 - 49 = (x+5)² - 7² = (x+5-7)(x+5+7) = (x-2)(x+12).
2) 3x² - 11x + 6 = 3x² - 9x - 2x + 6 = 3x(x-3) - 2(x-3) = (x-3)(3x-2).