Question

Use the suitable identities to solve the following: (y-9)(y-9)​

Answer 1

Step-by-step explanation:

(y-9)^2

y^2 -(9)^2+2×9y

y^2- 81 +18y

Answer 2

$\begin{gathered}\small{{{\fcolorbox{lightgreen}{lightgreen}{ {✵ verified \: answer ✵}}}}} \\ \end{gathered}$

Given :-

• Solve by using identities

To Find :-

• Value of (y-9)(y-9)

Formulae Used :-

$\red{ \boxed{ \sf{{(a - b)}^{2} = {a}^{2} - 2ab + {b}^{2} }}}$

Solution :-

$\ \: { \sf{( y- 9)( y-9 ) ={ (y - 9) }^{2} }} \\ \\ \ \: { \sf{{(y - 9) }^{2} = {y}^{2} - 2 \times y \times 9 + {9}^{2} }} \\ \\ \ \: { \sf{ \implies \: {y}^{2} - 18y + 81 }} \\ \\ \pink{ \sf{{(y - 9) }^{2} = {y}^{2} - 18y + 81 }}$