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alinaanananan
@alinaanananan
August 2022
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putczsk
А)х²=1/4
х=1/2
х=-1/2
б) (2х-5)(2х+5)=0
х=2,5
х=-2,5
в) (3х-х-1)(3х+х+1)=0
(2х-1)(4х+1)=0
х=1/2
х=-1/4
г) (7d-13-9d+25)(7d-13+9d-25)=0
(-2d+12)(16d-38)=0
d=6
d=38/16=19/8
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Answers & Comments
х=1/2
х=-1/2
б) (2х-5)(2х+5)=0
х=2,5
х=-2,5
в) (3х-х-1)(3х+х+1)=0
(2х-1)(4х+1)=0
х=1/2
х=-1/4
г) (7d-13-9d+25)(7d-13+9d-25)=0
(-2d+12)(16d-38)=0
d=6
d=38/16=19/8