<span>5a(a-3)x^2-4(a+1)x-8=0</span>
<span>а=5:</span>
<span>5*5(5-3)х²-4(5+1)х-8=0</span>
<span>25*2х²-4*6х-8=0</span>
<span>50х²-24х-8=0</span>
<span>25х²-12х-4=0 -квадратное уравнение</span>
<span>а=3:</span>
<span>5*3(3-3)х²-4(3+1)х-8=0</span>
<span>-4*4х-8=0</span>
<span>-16х-8=0 </span>
<span>2х+8=0 -линейное уравнение</span>
<span>а=-1</span>
<span>-5(-1-3)х²-4(-1+1)х-8=0</span>
<span>-5*(-4)х² -8=0</span>
<span>20х²-8=0</span>
<span>5х²-2 -0 </span>-квадратное уравнение
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