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Hilson
@Hilson
August 2022
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помогите упростить выражение(2x−3)(3x+7)−(x−5)(5x+6)−x2 и вычислить его значение при х=11/24
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NeZeRAvix
Verified answer
(2x-3)(3x+7)-(x-5)(5x+6)-x^2=
=6x^2+14x-9x-21-(5x^2+6x-25x-30)-x^2=
=6x^2+14x-9x-21-5x^2-6x+25x+30-x^2=
=24x+9
При x=11/24
24*11/24+9=11+9=20
2 votes
Thanks 5
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Answers & Comments
Verified answer
(2x-3)(3x+7)-(x-5)(5x+6)-x^2==6x^2+14x-9x-21-(5x^2+6x-25x-30)-x^2=
=6x^2+14x-9x-21-5x^2-6x+25x+30-x^2=
=24x+9
При x=11/24
24*11/24+9=11+9=20