Answer:
12 x^2 + 130 x + 238
Step-by-step explanation:
Expand the following:
(3 x + 7) (4 x + 9 + 5^2)
5^2 = 25:
(3 x + 7) (4 x + 9 + 25)
Grouping like terms, 4 x + 9 + 25 = 4 x + (25 + 9):
4 x + (25 + 9) (3 x + 7)
25 + 9 = 34:
(4 x + 34) (3 x + 7)
(3 x + 7) (4 x + 34) = (3 x) (4 x) + (3 x) (34) + (7) (4 x) + (7) (34) = 12 x^2 + 102 x + 28 x + 238 = 12 x^2 + 130 x + 238:
Answer: |
| 12 x^2 + 130 x + 238
