Question

(2x+1)² = (x+1)² + (x+2)² alguem me ajuda nesse cálculo ​

Answer 1

(2x+1)² = (x+1)² + (x+2)²

4x²+4x+1 = x²+2x+1 + x²+4x+4

2x² -2x -4 = 0

x² -x -2=0 => b/c=-1/-2 = -2+1/-2•+1

(x -2). (x+1)=0

x'=2. x"=-1 <===°°°©