Brian needs to find the value of a number, a, so that when (x^2+3x) is added to the binomial (3x^2+ax), the sum simplifies to 4x
^2+12x. What is the value of a?
1 answer:
Answer:
a = 9
Step-by-step explanation:
First we need to add (x^2+3x) to (3x^2+ax),
(x^2+3x)+(3x^2+ax)
Expand
= x^2+3x+3x^2+ax
Collect the like terms
= x^2+3x^2+3x+ax
= 4x^2 + 3x + ax
= 4x^2+(3+a)x
Equate the solution to 4x^2+12x
4x^2+(3+a)x = 4x^2+12x
Comparing the like terms on both sides
(3+a)x =12x
3 + a = 12
a = 12 - 3
a = 9
Hence the value of a is 9
You might be interested in
Product of 3 negatives equals a negative answer
Product of 3 positives equals a positive answer
Answer:
$16.12
Step-by-step explanation:
55% of $10.40 = 0.55 × $10.40 = $5.72
$10.40 + $5.72 = $16.12
Lol I actually laughed at this silly much ?
Your answer would be c
623.3 ft^3
The answer would be 5 = 30 ÷ 6 or ? = 30
