Question

expand
$(9 + 2x) ^{2}$
​

Answer 1

Step-by-step explanation:

${(9 + 2x)}^{2}$

${9}^{2} + {(2x)}^{2} + 2 \times 9 \times 2x$

$81 + {4x}^{2} + 36x$

THIS IS UR ANSWER AND PLS MARK ME THE BRAINILIST

Answer 2

Question:-

Expand (9+2x)².

Solution:-

We know that,

${(x + y)}^{2} = {x}^{2} + {y}^{2} + 2xy$

Therefore,

${(9 + 2x)}^{2} = {(9)}^{2} + {(2x)}^{2} + 2 \times 9 \times 2x$

$= 81 + 4 {x}^{2} + 36x$

$= 4 {x}^{2} + 36x + 81$

Answer:-

$4 {x}^{2} + 36x + 81$