7/12 = 14/24, 5/8 = 15/24, значит 7/12 меньше 5/8
<span>(3x3 + 3x2 – 4x + 5) + (x3 – 2x2 + x – 4)</span> <span>
= 3x3 + 3x2 – 4x + 5 + x3 – 2x2 + x – 4</span> <span>
= 3x3 + x3 + 3x2 – 2x2 – 4x + x + 5 – 4</span> <span>
= </span>4x3 + 1x2 – 3x + 1
Sфиг = 21,5 · (12 + 7) - 14,5 · 7 = 21,5 · 19 - <span>14,5 · 7 = 408,5 - 101,5 = 307 (см</span>²)
1*2=2*3=6*4=24*5=120*6= и так далее