(3х-8)²+(4х-8)(4х+8)+100=9х²-48х+64+16х²-64+100х=25х²+52х
подставляем значения
при -2 25×4+52×-2=-4
при -4 25×16+52×-4=192
<span>3</span><em>x</em><span> - 4</span><em>y</em><span> + </span><em>C</em><span> = 0, (3)</span>
<span><span>3</span><em>x</em><span> - 4</span><em>y</em><span> + 14 = 0.</span></span>