Question

write down the square of 2x+9​

Answer 1

Answer:

4x²+36x+81

Step-by-step explanation:

(2x+9)²

by (a+b)²= a²+ 2ab +b²

(2x)²+2(2x *9)+(9)²

4x²+36x+81

Answer 2

Question :

to find value of

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

forumla

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

solution:

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

$= 4x {}^{2} + 81 + 2 \times 2x \times 9$

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

follow me

mark answer as brainlist