<span>(7,42*5/9-(-11,48):1 4/5):0,35</span>
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<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>
1) b/( b - c ) + bc/( c^2 - b^2 ) = ( - b( c + b ) + bc ) /( c^2 - b^2 ) = ( - bc - b^2 + bc ) / ( c^2 - b^2 ) = ( - b^2 ) / ( c^2 - b^2 )
2) c^2 - 2bc + b^2 = ( c - b )^2
3) ( ( - b^2 )/( c^2 - b^2 )) • ( ( c - b )^2 / b^2 ) = ( - ( c - b ) / ( c + b ) = ( b - c ) / ( b + c )
Ответ ( b - c ) / ( b + c )
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