Y=∛x
x | -27 | 1 | 125
y | -3 |+1| +5
{Y=2+x
{X^2+x•(2+x)=12
x^2+2x+x^2=12;
2x^2+2x-12=0; |:2
X^2+x-6=0;
D=1+24=25;
X1=(-1+5)/2=2;
X2=(-1-5)/2=-3;
Y1=2+2=4;
Y2=2-3=-1.
1. <span>((a+b)-(a-b))*((a+b)+(a-b))*(1/a+1/b) = (a+b-a+b)*(a+b+a-b)*(1/a+1/b) = 2a*2b*(a+b)/ab = 4a+4b = 4(a+b)</span>
2. (1,8<span>·3</span>)(10-3<span>·105</span>)=5,4
3. -164
4. 3,3
5. 6
6. А
7. Б