Question

10.4^2 using identity

Answer 1

${10.4}^{2} = {(10 + 0.4)}^{2} \\ \\ \underline{identity - } \\ \\ \red{ {(a+ b) }^{2}} = \purple{ {a}^{2} + 2ab + {b}^{2} } \\ \\ \implies \: {10}^{2} + 2(10)(0.4) + {0.4}^{2} \\ \\ \implies \: 100 + 8 + 0.16 \\ \\ \large\orange{ \boxed{ \pink{= 108.16}}}$

Answer 2

Don't know the answer sorry.