Ответ:
a)D=2²-4*3*(-1)=4+12=16
б)D=4²-4*(-1)*3=16+12=28
в)D=-7²-4*1*(-4)=49+16=65
г)D= (-2.4²)-4*1*1=5.76-4=1.76
д)D=(-5)²-4*4*(-4)=25+64=89
e)D=5²-4*3*(-2)=25+24=49
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Ответ:
a)D=2²-4*3*(-1)=4+12=16
б)D=4²-4*(-1)*3=16+12=28
в)D=-7²-4*1*(-4)=49+16=65
г)D= (-2.4²)-4*1*1=5.76-4=1.76
д)D=(-5)²-4*4*(-4)=25+64=89
e)D=5²-4*3*(-2)=25+24=49