X^2(x-2)-64(x-2)=0
(x^2-64)(x-2)=0
(x-8)(x+8)(x-2)=0
x=8 x=-8 x=2
Ответ: { -8; 2; 8 }
8xy^2(6y^2+x)=48xy^4+8x^2y^2
^ - степень числа
<span><span>{<span><span>2x+5y=−7</span><span>y=3x−15</span></span></span>⇒</span><span><span>{<span><span>2x+5<span>(3x−15)</span>=−7</span><span>y=3x−15</span></span></span>⇒</span><span><span>{<span><span>17x−68=0</span><span>y=3x−15</span></span></span>⇒</span><span><span>{<span><span>x=4</span><span>y=3x−15</span></span></span>⇒</span><span>{<span><span>x=4</span><span>y=−3</span></span></span>Ответ:<span><span>(4;−3)</span></span>
<span>(а+3)(а-1)-а(а+2)=
=a^2-1a+3a-3-a^2-2a=
=-1a+3a-2a-3=-3</span>