Автор - ZIGZAG21

4x(x+3) - (2x+5)(2x-5)=49​

Ответ

Автор - Seyitmyradova78

Пошаговое объяснение:

4x(x+3) - (2x+5)(2x-5)=49

4x^2 +12x - 4x^2 +25 =49

12x= 49 -25

12x= 24

x=24 :12

x=2

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