Question

(a+2)²=a²+(____)a+2²​

Answer 1

${(a + 2)}^{2} = {a}^{2} + {2}^{2} + 2 \times a \times 2$

___________________________

More information

____________

In this algebraic identity is used.Algebraic identity which is very useful in solving algebraic questions. There are more identities of algebra. Example:-

$(1) {(a - b)}^{2} = {a}^{2} + {b}^{2} - 2ab$

$(2) (a + b)(a - b) = {a}^{2} - {b}^{2}$

$(3) {(a + b)}^{3} = {a}^{3} + {b}^{3} + 3ab(a + b)$

And there are many more identities which are useful for us.

These identities made by muslim mathematician.

==============

Hope this help you

==============