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KanekiKen202
@KanekiKen202
July 2022
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СРОЧНО ДАЮ 30 БАЛЛОВ
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leintevaalena23
А) 3х ²-7х+9
б)3х ²+9=0; 3х ²=-9;х ²=-9:3; х ²=-3
в)•6х ²+х-7=0; Д=1-4*6*(-7)=1+168=169, √Д=13; х1=-1-13/2*6=-14/12=-7/6
х2=-1+14/2*6=13/12
• х ²-4х+3=0; Д= 16-4*1*3=16-12=4, √Д=2
х1=4-2/2=2/2=1
х2=4+2/2=6/2=3
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Answers & Comments
б)3х ²+9=0; 3х ²=-9;х ²=-9:3; х ²=-3
в)•6х ²+х-7=0; Д=1-4*6*(-7)=1+168=169, √Д=13; х1=-1-13/2*6=-14/12=-7/6
х2=-1+14/2*6=13/12
• х ²-4х+3=0; Д= 16-4*1*3=16-12=4, √Д=2
х1=4-2/2=2/2=1
х2=4+2/2=6/2=3