7×^2=(2×+1)^2+3×^2-5

Question

7×^2=(2×+1)^2+3×^2-5

Answer 1

7x^2=(2x+1)^2+3x^2-5
7x^2=4x^2+4x+1+3x^2-5
7x^2=7x^2+4x-4
0=4x-4
-4x=-4
x=1

Answer 2

Может быть и неправильно

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