Ответ: 1) X^2-8/9*x+16/81 = 0
3)X^2 - 152/49 = 0
Пошаговое объяснение:
5*(2x-y)-3*(3x-2y)=
=10x-5y-9x+6y=
=x+y
6(6а+8б) тебе просто вынести?
<span><span>−5x2+21x−18</span>2x2−3x</span>=<span>0
</span><span><span>−5x2+21x</span>−18</span>=<span>0
</span><span><span>(<span>−5x+6</span>)</span>(x−3)</span>=<span>0
</span><span><span><span>−5x</span>+6</span>=<span><span><span>0 or </span>x</span>−3</span></span>=<span>0
</span><span>x=<span><span><span>65</span><span> or </span></span>x</span></span>=<span>3</span>