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элиф1998
@элиф1998
July 2022
1
9
Report
РЕШИТЕ УРАВНЕНИЯ
1)x^2-6x=5x-12-x^2
2)-3x^2-x+8=(x-3)^2
3)-x^2+3x+55=(x+7)^2
СРОЧНО!!!!!!!!!!!!!!!!СРОЧНО!!!!!!!!!!!!!!!!!СПАСИБО ЗА РАНЕЕ !!!!!!!!
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Polechka12
Verified answer
1.
2x^2-11x+12=0
D=121-96=25
x1=(11+5)/4=4
x2=(11-5)/4=1,5
2.
-3x^2-x+8=x^2-6x+9
-4x^2+5x-1=0
4x^2-5x+1=0
D=25-16=9
x1=(5+3)/8=1
x2=(5-3)/8=0,25
3.
-x^2+3x+55=x^2+14x+49
-2x^2-11x+6=0
2x^2+11x-6=0
D=121+48=169
x1=(-11+13)/4=0,5
x2=(-11-13)/4=-6
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Answers & Comments
Verified answer
1.2x^2-11x+12=0
D=121-96=25
x1=(11+5)/4=4
x2=(11-5)/4=1,5
2.
-3x^2-x+8=x^2-6x+9
-4x^2+5x-1=0
4x^2-5x+1=0
D=25-16=9
x1=(5+3)/8=1
x2=(5-3)/8=0,25
3.
-x^2+3x+55=x^2+14x+49
-2x^2-11x+6=0
2x^2+11x-6=0
D=121+48=169
x1=(-11+13)/4=0,5
x2=(-11-13)/4=-6