Svetakotok
08.10.2019 •
Mathematics
Which equation has the solutions?
a) 2x2 + 6x + 9 = 0
b) x2 + 3x + 12 = 0
c) x2 + 3x + 3 = 0
d) 2x2 + 6x + 3 = 0
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Ответ:
Option c is correct.
Step-by-step explanation:
We have been given the solution of the equation:
We will use the formula for finding the solutions of quadratic equation.
Then
Equation
a=1,b=3 and c=3
Now,
And
So,
Therefore Option c is correct.
Ответ:
4
Step-by-step explanation:
the two angles here are vertical angles, meaning they are congruent
first we can subtract 2x from both sides:
then we add 3 to both sides:
lastly, we follow the Multiplicatin Property Of Equality and divide both sides of the equation by 4: