Объяснение:
(5х-9)(4х-7)-(10х-3)(2х+1)=20х^2-36х-35х+63-20х^2+6х-10х+3=-75х+66
х=-1
-75*(-1)+66=75+66=141
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Объяснение:
(5х-9)(4х-7)-(10х-3)(2х+1)=20х^2-36х-35х+63-20х^2+6х-10х+3=-75х+66
х=-1
-75*(-1)+66=75+66=141