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stsik1
@stsik1
July 2022
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(4x-3)•(x+7)=
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Brickle
(4х-3)(х+7)= 4
+ 28х - 3х - 21 = 4
+ 25х - 21
Можно вычислить дискриминант.
D = 625 - 4 * 4 * 21 = 625-336= 289
х1 = -25 + 17 / 8 = -1
х2 = -25 - 17 / 8 = -5,25
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Answers & Comments
Можно вычислить дискриминант.
D = 625 - 4 * 4 * 21 = 625-336= 289
х1 = -25 + 17 / 8 = -1
х2 = -25 - 17 / 8 = -5,25