<span>(7,42*5/9-(-11,48):1 4/5):0,35</span>
<span>
</span>
<span>1)7.42*5=37.1</span>
<span>2)37.1/9=371/90</span>
<span>3)11.48/14=0.82</span>
<span>4)0.82/5=41/250</span>
<span>5)-(-41/250)=41/250</span>
<span>6)371/90+41/250=4822/1125</span>
<span>7)4822/0.35=96440/7</span>
<span>8)96440/1125=19288/225</span>
<span>9)1/(7*225)=1/1575</span>
<span>Ответ: 19288/1575=12+(388/1575)</span>
Х^-2/х^3 = 1/32
х^-5 = 1/2^5
х^-5 = 2^-5
х = 2
у^2 / у^-2 = 81
у^4 = 81
у^4 = 3^4 = (-3)^4
у1 = 3 ; у2 = -3
1. 5а^3/7b
2. 7<u /><span>x² + 21x = 0
7х(х+3)=0
7х=0
х(1)=0
х+3=0
х(2)=-3
х(1)+х(2)=0+(-3)=-3
3.(списать пример)=</span>9*11-80=19
81-8,3t-(75-8,3t)=3
81-8,3t-75+8,3t=3
6≠3
не при каком значении t разность не будет равна 3