Ответ:
1.x1=(2+10)/2=6;
x2=(2-10)/2=-8/2=-4;
2.x1=(1+7)/12=8/12=2/3;
x2=(1-7)/12=-6/12=-0,5;
Объяснение:
1. -b^2+2b+24=0 | *(-1)
b^2-2b-24=0
D=(-2)^2-4*1*(-24)=4+96=100;
x1=(2+10)/2=6;
2.6x^2-x-2=0
D=(-1)^2-4*6*(-2)=1+48=49;
x1=(1+7)/12=8/12=2/3;
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Answers & Comments
Ответ:
1.x1=(2+10)/2=6;
x2=(2-10)/2=-8/2=-4;
2.x1=(1+7)/12=8/12=2/3;
x2=(1-7)/12=-6/12=-0,5;
Объяснение:
1. -b^2+2b+24=0 | *(-1)
b^2-2b-24=0
D=(-2)^2-4*1*(-24)=4+96=100;
x1=(2+10)/2=6;
x2=(2-10)/2=-8/2=-4;
2.6x^2-x-2=0
D=(-1)^2-4*6*(-2)=1+48=49;
x1=(1+7)/12=8/12=2/3;
x2=(1-7)/12=-6/12=-0,5;