<span>1) (</span>126<span>+</span>84<span>)/</span>5<span>=42 </span>км<span> (</span>скорость<span>)</span>
<span>2)<span> (</span>126<span>/42=3 </span>часа<span> </span></span>
<span> </span><span>Ответ: 3 </span>часа<span>.</span>
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5x^2-3x-2/5x^2+2x= 5x^2+2x-5x-2/5x^2+2x= x(5x+2)-(5x+2)/x(5x+2)=(5x+2)(x-1)/x(5x+2)= x-1/x
2 480 041=2 000 000+400 000+80 000+40+1
4 208 170=4 000 000+200 000+8 000+100+70
1 700 003=1 000 000+700 000+3
870 500=800 000+70 000+500
230 410 000=200 000 000+400 000+10 000
200 500=200 000+500