<span>а)a^3+a^2b +ax+ bx=(b+a)*(x+a^2)</span>
<span>б)<span>a^6 +a^5-a^4-a^3=(a-1)*a^3*(a+1)^2</span></span>
<span><span>в)<span>x^4y-x^3-y^2+5zy-5zx=5*y*z-5*x*z-y^2+x^4*y-x^3</span></span></span>
<span><span><span>г)<span>a^4x^4-a^3x^3+z^2-axz^2=-(a*x-1)*(z^2-a^3*x^3)</span></span></span></span>
<span><span><span><span>д)<span>ax+ay+bx+by-cx-cy=-(c-b-a)*(y+x)</span></span></span></span></span>
<span><span><span><span><span><span>е)a^2x-ax^2+3x-3a+ac-cx=-(x-a)*(a*x+c-3)</span></span></span></span></span></span>
<span><span><span><span><span><span><span>ж)x^4+x^3+abx-c^2x+ab-c^2=(x+1)*(x^3-c^2+a*b)</span></span></span></span></span></span></span>
<span><span><span><span><span><span><span><span>з)a^5-a^4x-ab+x^5-ax^4+bx=(x-a)*(x^4+b-a^4)</span></span></span></span></span></span></span></span>
t=2,34:2,32 если округлить до десятичных то примерно=1
если не округлять то 1,0086206896551
8 * ( 1/2 * 2* sin (pi/12) * cos (pi/12) - 1) = 8 * ( 1/2 * sin (pi/6) - 1) = 8 * ( 1/2 * 1/2 - 1)= 8* ( 1/4 - 1) = 8 * (-3/4) = - 6
<span>ctg(Пх/12)= -1
</span>(pi*х/12)= -pi/4+pi*k
pi*х= -3pi+12*pi*k
<span>х= -3+12*k</span> - это ответ