Respuesta :
You can solve this a variety of ways
[tex] {40}^{2} = 40 \times 40 = 40 \times 10 \times 4[/tex]
[tex] {40}^{2} = 400 \times 4 = 1600[/tex]
[tex] {40}^{2} = 1600[/tex]
[tex] {40}^{2} = 40 \times 40 = 40 \times 10 \times 4[/tex]
[tex] {40}^{2} = 400 \times 4 = 1600[/tex]
[tex] {40}^{2} = 1600[/tex]