Два числа кратны 35
35, 70
<span>(x²+4)²-16x²=(х</span>²+4-4х)(х²+4+4х)=(х²-4х+4)(х²+4х+4)=(х-2)²(х+2)².
<span>x+3x+2*3x=120
4х + 6х = 120
10х = 120
х = 120 : 10
х = 12
Проверка
</span>
<span>12 + 3 * 12 + 2 * 3 * 12 = 120</span>
12 + 36 + 72 = 120
120 = 120