
Solve .
Answer
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Hint: In order to determine the factors of the above quadratic equation use the Splitting up the middle term method or also called mid-term factorization method. In which the middle term would be splitted into two parts and similar values will be taken common and equated to zero to obtain the roots.
Complete step by step solution:
Since, the highest degree in the given polynomial is two, so it’s a quadratic equation.
Given a quadratic equation ,let it be
Comparing the equation with the standard Quadratic equation
becomes
becomes
And becomes
To find the quadratic factorization we’ll use splitting up the middle term method
So first calculate the product of coefficient of and the constant term which comes to be
Now second Step is to the find the factors of the number such that whether, addition or subtraction of those numbers is equal to the middle term or coefficient of and the product of those factors results in the value of constant.
So, if we factorize , the answer comes to be and as that is the middle term. and which is perfectly equal to the constant value.
Now writing the middle term sum of the factors obtained, so equation becomes
Now taking common from the first terms and last terms
Finding the common binomial parenthesis, the equation becomes
Hence, we have successfully factorized our quadratic equation.
Therefore, the factors are and .
Equating the factors with zero to get the roots:
And,
Therefore, the roots of the quadratic equation are: and .
Note:
Alternative Approach:
You can also alternatively use a direct method which uses Quadratic Formula to find both roots of a quadratic equation as
and
, are root to quadratic equation
For the equation given above , comparing the equation with the standard Quadratic equation
becomes
becomes
And becomes
Substituting these values in and , and we get:
For first root:
Since, we know that , so opening the parenthesis above:
Therefore, the first root is .
Similarly, for second root:
Since, we know that , so opening the parenthesis above:
Therefore, the first root is .
Hence, the factors will be .
1. Mid-term factorization and Quadratic formulas are always applied on Quadratic Equations.
2. Any one of the above methods can be used to find the roots of the quadratic equation.
3. We can leave the values till factors until it’s given to find the roots.
4. Don’t forget to compare the given quadratic equation with the standard one every time.
Complete step by step solution:
Since, the highest degree in the given polynomial is two, so it’s a quadratic equation.
Given a quadratic equation
Comparing the equation with the standard Quadratic equation
And
To find the quadratic factorization we’ll use splitting up the middle term method
So first calculate the product of coefficient of
Now second Step is to the find the
So, if we factorize
Now writing the middle term sum of the factors obtained, so equation
Now taking common from the first
Finding the common binomial parenthesis, the equation becomes
Hence, we have successfully factorized our quadratic equation.
Therefore, the factors are
Equating the factors with zero to get the roots:
And,
Therefore, the roots of the quadratic equation
Note:
Alternative Approach:
You can also alternatively use a direct method which uses Quadratic Formula to find both roots of a quadratic equation as
For the equation given above
And
Substituting these values in
For first root:
Since, we know that
Therefore, the first root is
Similarly, for second root:
Since, we know that
Therefore, the first root is
Hence, the factors will be
1. Mid-term factorization and Quadratic formulas are always applied on Quadratic Equations.
2. Any one of the above methods can be used to find the roots of the quadratic equation.
3. We can leave the values till factors until it’s given to find the roots.
4. Don’t forget to compare the given quadratic equation with the standard one every time.
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