<h3>1262,5 корень 244 сначала умножаем 12.5*50.5 </h3>
X2=t
3t²-13t+4=0
D=b²-4ac=169-48=121 √D=11
t1=13+11/6=4
t2=13-11/6=2/6=1/3
так как x²=t⇒
x²=4
x1=+2
x2=-2
x²=1/3
x1=√1/3
x2=-√1/3
<span>(2y-3)(3y+1)+2(y-5)(y+5)-(1-2y)²=6у²+2у-9у-3+2у²-50-1-4у²+4у=4у²-3у-54</span>
Смотри..........................
А) 7a+7y = 7*(a + y)
<span>б) -8b+8c = - 8*(b - c) </span>
<span>в) 12x+48y = 12*(x + 4y) </span>
г) -9m-27n = -9*(m + 3n)
д)12a+12 = 12*(a + 1)
<span>е)-10-10c = -10*(1 + c)</span>