Question

Write the value of the expressions when $a=1,b=3$ and $c=3.$

$a^2+b^2+c^2$

Answer 1

We can write the given algebraic expression as :

$a^2+b^2+c^2=a\times a+b\times b+c\times c$

Substitute the value of $a,b$and $c$ , we get :

$$\begin{gathered} a^2+b^2+c^2=1\times 1+3\times 3+3\times 3 \\ =1+9+9 \\ =10+9 \\ =19 \end{gathered}$$

So, the value of given algebraic expression is $19$.