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alija99
@alija99
June 2022
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формула корней квадратного уравнения
формула корней квадратного уравнения Помогите пожалуйста 8 класс
15у²- 22у-37= 0
х² - 22х - 23=0
(5х+3)² = 5х+3
(3х-8)² = 3х-8х
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gabitova963
15у²- 22у-37= 0
D=121+555=676
y=
=37/15
= -1
__________________
х² - 22х - 23=0
D=121+23=144
x=11+-12
=23
=-1
_____________________
(5х+3)² = 5х+3
25
+30x+9-5x-3=0
25
+25x+6=0
D=625-6*25*4=25
x=
=2/5
=-3/5
___________
(3х-8)² = 3х-8х
9
-48x+64-3x+8x=0
9
-51x+72=0
D=2601-4*72*9=9
x=
=3
=2
1 votes
Thanks 1
alija99
огромное спасибо
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Answers & Comments
D=121+555=676
y=
=37/15
= -1
__________________
х² - 22х - 23=0
D=121+23=144
x=11+-12
=23
=-1
_____________________
(5х+3)² = 5х+3
25+30x+9-5x-3=0
25+25x+6=0
D=625-6*25*4=25
x=
=2/5
=-3/5
___________
(3х-8)² = 3х-8х
9-48x+64-3x+8x=0
9-51x+72=0
D=2601-4*72*9=9
x=
=3
=2