1)
b = - 4.
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x=0 и x=2 .
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b= - 6 и b=4.
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2) например (3x+7)/(x-10).
3) (a-5)/a =(20-5)/20 =15/20 =3/4 или иначе 0,75 .
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1а) (3^4)/3² =3² =9.
1б) 64/4² =64/16 =4.
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2а) 6xy²/8x²y =3y/4x.²
2б) 9(a-b)²/18(a-b) =(a-b)/2.