Question

Qual o valor de m? ​

Answer 1

(-1-1)² +(2+1)² +(3-m)² = 7²

4 + 9 + (3-m)² = 49

(3-m)² = 36

3-m = ±6

=> 3-m=+6 => m'= -3 ✓

=> 3-m=-6 => m"= 9 ✓