Question

The expansion of 〖(x+9)〗² is  x² +  _________.
a) 18 x + 81
b) 18 + 81 x
c) 18 x - 81
d) none of these​

Answer 1

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

$= {x}^{2} + {9}^{2}$

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

So, the answer is d) None of these

Answer 2

Answer:

18x + 81

Step-by-step explanation:

x²+ 2× 9x+ 9²

x²+18x+81