3x³ - 2x² + 9x - 6 = (3x³ - 2x²) + (9x - 6) = x²(3x - 2) + 3(3x - 2) =
= (3x - 2)(x² + 3)
<span>на 1. </span>
<span>3 ^ 1 = 3 </span>
<span>3 ^ 2 = 9 </span>
<span>3 ^ 3 = 7 </span>
<span>3 ^ 4 = 1</span>
А) 1)1÷1 7/8=1÷15/8=8/15;
2) <span>3/7×3 1/2=3/7*7/2=3*7/(7*2)=3/2;
</span> 3) <span>2/3÷5/6=2*6/(3*5)=12/15=4/5
</span> 4) 8/15+3/2-4/5=8/15+0,6=8/15+3/5=(8+9)/15=17/15=1 2/15.
б)(-3)²+ (1/2)² ×3³=9+1*27/4=9+6 3/4=15 3/4.