Answer:
The coefficient of the 2nd term of trinomial is 18.
Step-by-step explanation:
You can expand in a faster way by using the formula, (a+b)² = a²+2ab+b² :
(3x+3)² = (3x)² + 2(3x)(3) + 3²
= 9a² + 18a + 9
OR
You can expand it by doing step by step :
(3x+3)² = (3x+3)(3x+3)
= 3x(3x) + 3x(3) + 3(3x) + 3(3)
= 9x² + 9x + 9x + 9
= 9x² + 18x + 9
The sum of 4 consecutive odd integers is 336. Find the largest integer. Let x, x+2, x+4, x+6 be the 4 integers. 81+6=87 ans.
I always use Algebra Mathaway or Math Papa
It's pretty straightforward and simple:
Six more means + 6.
Twice a number means 2n.
Is 16 means = 16
Now combine these three definitions and you will receive:
6 + 2n = 16
Now solve this simple equation:
6 + 2n = 16
2n = 16 - 6
2n = 10
n = 10 / 2 = 5
So the correct answer is D.
