(4х+5)(х-7)=0
4х+5=0 или х-7=0
4х=-5. х=7
х= -5/4
ответ: х1= -5/4; 7.
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(4х+5)(х-7)=0
4х+5=0 или х-7=0
4х=-5. х=7
х= -5/4
ответ: х1= -5/4; 7.