Question

Responder a questão 2a²+ (a+3c)²- a.( a+ 2c)

Answer 1

2a²+ (a+3c)²- a.( a+ 2c)
2a²+ (a² + 2.a.3c +(3c)²) -a² -2ac
2a²+ (a² +6ac +9c²) -a² -2ac
2a²+ a² +6ac +9c² -a² -2ac
2a² + a² -a² +6ac -2ac+9c²
2a² +0 +4ac +9c²
2a² +4ac +9c²