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(2x+3)*(2x-3)-(2x+1) la puterea a 2-a + (4x+1)

Răspuns :

4x^2-9-4x^2-1+4x+1=0
4x=9
x=4/9
4x la a doua - 9- 2x la a doua -4x -1 + 4x + 1=2x la a doua - 9

sper ca e ok