1) (3x-1)(x+2)=20 2) (x-4)(4x-3)+3=0
3) (x-3)²+(x+4)²-(x-5)²=17x+24
4) (x+5)²+(x-2)²+(x-7)(x+7)=11x+80
СРОЧНОО ПОМАГИТЕ С РЕШЕНИЕМ КАК МОЖНО БЫСТРЕЙ
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