Evaluate using suitable identity:
a). 103²

10609
Answer:
[tex]\sf \longmapsto 103^2[/tex]
[tex]\sf \longmapsto (a + b)^2 = a^2 + 2ab + b^2[/tex]
Here,
[tex]\sf \longmapsto (100 + 3)^2 = 100^2 + 2(100)(3) + 3^2[/tex]
[tex]\sf \longmapsto 100^2 + 2(100)(3) + 3^2[/tex]
[tex]\sf \longmapsto 10000 + 600 + 9[/tex]
[tex]\sf \longmapsto 10609[/tex]