Question

Si x = 4, y = -1, entonces (x + y)2 – 2x – 2y = ?

Answer 1

(4-1)2 - 2(4) - 2(-1)

6 - 8 + 2

= 0

Answer 2

(4-1)2-2(4)-2(-1)= 0 solo multiplica, suma y resta