Solve.
x² + 6x + 9 = 12
(Choices in photo)
2 answers:
X^2 + 6x + 9 = 12
X^2 + 6x - 3 = 0
(-6 ± <span>√(6^2 - 4*1*-3) ) / 2
3 </span>± √(48) / 2<span>
</span>3 ± 4√(3) / 2
3 ± 2√(3)
To solve this problem and to calculate the value of the variable "x", you must apply the following proccedure:
1. You have the quadratic equation:
<span>
x²+6x+9=12
2. Then:
</span>x²+6x+9-12=0
x²+6x-3=0
<span>
3. You must apply the quadratic formula, which is:
(-b±√(b^2-4ac))/2a
a=1
b=6
c=-3
4. Then, the result is:
x=-3</span>±2√3
<span>
Therefore, the correct option is the first one: </span>x=-3±2√3
You might be interested in
The dog's bowl was empty.
The singer's songs were finished.
Answer:
C
Step-by-step explanation:
7*7=49
If the height is h, then h/65=sin70, so h=65sin70=61.08m approx.
Answer:
-1.2
Step-by-step explanation:
