Question

add. 1) x²+3x²+x²
2) 9x²+9x²+x²​

Answer 1

Answer:

${x}^{2} + 3 {x}^{2} + {x}^{2} + 9 {x}^{2} + 9 {x}^{2} + {x}^{2} = 3 {x}^{2} + 3 {x}^{2} + 18 {x}^{2}$

$24 {x}^{2}$

that's is your answer