Question

Найдите корни уравнений 
7x^2=(2x+1)^2+3x^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
-4x=-4
x=1

Answer 2

7 x^{2} -4 x^{2} -4 x- 1 - 3 x^{2} +5 =0
-4 x = -4
х=1