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zxc4091
@zxc4091
July 2022
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Решите уравнение и сделайте проверку 1-4y^2=0
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VekaSolnce
1-4y²=0
(1-2y)(1+2y)=0
1-2y=0 или 1+2y=0
-2y=-1 2y=-1
y=-1:(-2) y=-1:2
y=0.5 y=-0.5
проверка:
1-4*(0,5)²=0 1-4*(-0,5)²=0
1-4*0,25=0 1-4*0,25=0
1-1=0 1-1=0
0=0 0=0
4 votes
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Answers & Comments
(1-2y)(1+2y)=0
1-2y=0 или 1+2y=0
-2y=-1 2y=-1
y=-1:(-2) y=-1:2
y=0.5 y=-0.5
проверка:
1-4*(0,5)²=0 1-4*(-0,5)²=0
1-4*0,25=0 1-4*0,25=0
1-1=0 1-1=0
0=0 0=0