Question

(2x+1) la puterea doua- 5x la puterea doua + (x-2)(x+2)-4x=-3
Imi trebuie URGENT

Answer 1

4x²+4x+1-5x² + x²-4-4x=-3
-x²+4x+1+x²-4-4x=-3
x² se reduce
4x+1-4-4x=-3
4x se reduce
1-4=-3
-3=-3
relatia este adevarata

Answer 2

$(2x+1)^2-5x^2+(x-2)(x+2)-4x=-3 \\ (2x)^2+2 \cdot 2x \cdot 1+1^2-5x^2+x^2-4-4x=-3 \\ 5x^2+4x+1-5x^2+x^2-4-4x=-3 \\ -3=-3~(A)$