Question

[(a+b)²-(a-b)²]²= sendo que a² + b² = 15 e ab = 12

Answer 1

[(a+b)^2-(a-b)^2]^2 
[(a^2+b^2+2ab)-(a^2+b^2-2ab)]^2
[(15+2.12)-(15-2.12)]^2
[(15+24)-(15-24)]^2
[39-(-9)]^2
48^2=2304