Раскройте скобки:
а) 1/4 * ( 4 + 12х )
б) ( 3/4 - а ) * 2/3
а) 1/4*(4+12х)=0.25*(4+12x)=1+3x
б) (3/4-а)*2/3=0.5-2/3a
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а) 1/4*(4+12х)=0.25*(4+12x)=1+3x
б) (3/4-а)*2/3=0.5-2/3a