Question

1- determine o valor das expressões
A) (3-√3).(3+√3)
B)(7√2-3√5).(7√2+3√5)
C) (1-√2)²
D) (√7-√2).(√7+√2)??

Me ajudem por favor

Answer 1

a)1,27.4,73=6,0071
b) 3,15.16,89=52,2585
c) 1-1,9881=-0,9881
d) 1,24.4.06=5,0344