Question

Multiple 3a2+a+9 by a+3​

Answer 1

Answer:

Please refer to the attachment.

Answer 2

$\huge{\textbf{\textsf{{\color{navy}{Sol}}{\purple{ut}}{\pink}{ion࿐}}}}$

$3{a}^{2} + a + 9 \times a + 3$

$a(3 {a}^{2} + a + 9) + 3(3 {a}^{2} + a + 9)$

$3 {a}^{3} + {a}^{2} + 9a + 9 {a}^{2} + 3a + 27$

$3 {a}^{3} + {a}^{2} + 9 {a}^{2} + 9a + 3a + 27$

$3 {a}^{3} + 10{a}^{2} + 12a + 27$