Directions (31-35): In each of the following questions two equations are given. Solve these equations and give answer:
I. x2 + 12x + 35 = 0
II. y2 + 9y + 20 = 0
Correct Answer :
if x ≤ y
Solution :
The correct answer is if x ≤ y.
To determine the relationship between and , we solve both quadratic equations step-by-step.
Step 1: Solve Equation I for
The given equation is:
We factorize the quadratic equation by splitting the middle term. We look for two numbers that multiply to 35 and add up to 12. These numbers are 7 and 5.
This gives the roots:
or
Step 2: Solve Equation II for
The given equation is:
We look for two numbers that multiply to 20 and add up to 9. These numbers are 5 and 4.
This gives the roots:
or
Step 3: Compare the values of and
Let us compare each value of with each value of :
- Comparing with and :
Since and , we have .
- Comparing with and :
Since , we have .
Since , we have .
Combining these comparisons, we find that is either less than or equal to .
Thus, the relationship is:
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