2x(8x-4)-(4x-2)(4x+2)=-12
16x^2-8x-(16x^2-4)=-12
16x^2-8x-16x^2+4=-12<em /><u />
-8x=-16
x=-16/-8
x=2
1) y'= 3^x * ln3 -2
2)y'=5^6x-1 * ln5*(6x-1)' +e^3x * (3x)' = 5^6x-1 * 6ln5 + 3e^3x
<span>3)y=log3*(x^2+2x+4)
y'= 1/[(x</span>²+2x+4)*ln3] *(2x+2)
<span>
4)y=ln*(x^2-3x)+cos3x
y'= 1/(x</span>²-3x) * (2x-3) -sin3x * 3
1)Упростите:a^3 + 125 b^3 -(a+5b)^3 =a^3+125b^3-a^3-125b^3-15a^2b-75ab^2=-15ab(a+5b)=-15a^2b-75ab^2
2)Разложите на множители:8+12a +6a ^2 + a^3<span> =(a+2)^3</span>
1)-4х=1,6; х=1,6:(-4)=-0,4;
2)11х= -3; х=-3/11;
3)5х-10-3х=-1; 5х-3х=-1+10; 2х=9; х=9/2; х=4 1/2 или 4,5
4)15+7х=0; 7х=-15; х=-15/7=-2 1/7;
5)3х-8=8+11х; 3х-11х=8+8; -8х=16; х=-2;
6)20-(2х+2)=5; 20-2х-2=5; -2х=5+2-20; -2х=-13;
Х=13/2; х=6 1/2 или 6,5
7)0,2(3х-2)+1,2=0,5х-20 ; 0,6х-0,4+1,2=0,5х-20;
0,6х-0,5х=-20+0,4-1,2; 0,1х=-20,8; х=-20,8:0,1;
Х=-208;