Question

B= (bij) 2x4 onde bij= i² - j²

Answer 1

b11 b12 b13 b14
b21 b22 b23 b24    

b11= 1² - 1² = 0
b12 = 1² - 2² = -3
b13= 1² - 3² = -8
b14= 1² - 4² = -15
b21= 2² - 1² = 3
b22= 2² - 2² = 0
b23= 2² -3² =-5
b24= 2²- 4² = -12

0 -13 -8  -15
3   0   -5  -12
creio q seja assim