Directions (41-45):In each of these questions, two equations (I) and (II) are given. Solve the equations and mark the correct option.
I. x2 + 21x + 108 = 0
II. y2 + 14y + 45 = 0
Correct Answer :
If x ≤ y
Solution :
The correct option is If x ≤ y.
Step 1: Solve Equation I for x
To factorize this quadratic equation, we split the middle term into two numbers whose sum is 21 and product is 108.
The suitable numbers are 12 and 9.
Equating each factor to zero gives:
Step 2: Solve Equation II for y
Similarly, we split the middle term into two numbers whose sum is 14 and product is 45.
The suitable numbers are 9 and 5.
Equating each factor to zero gives:
Step 3: Compare the values of x and y
Let's compare every value of x with every value of y:
1. For :
2. For :
In all cases, x is either less than or equal to y ().
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