1) 4x-3y=12; -3y=12-4x; -y=(12-4x)/3; y=(4x-12)/3;
2) 4x-3y=12; 4x=12+3y; x=(12+3y)/4;
2x²=30
x²=15
x²-15=0
(x-√15)(x+√15)=0
x=√15 или x=-√15
Решаем квадратное уравнение, D =49, корни +2 и -1/3.
<span>разлагается по формуле ax </span>2<span> <span>+ bx+ c = a </span></span><span>(<span> x – x</span></span>1 <span>) (<span> x – x</span></span>2 <span>)<span> .
</span></span><span>3x^2-5x-2 = 3(х +1/3) (х-2).</span>
((с+2√d)²/10(c+2√d)(c-2√d))((c-2√d)/(c+2√d))=((с+2√d)²(c-2√d))/(10(c-2√d)(c+2√d)²)=
1/10