Question Details

Directions (31-35): In each of the following questions two equations are given. Solve these equations and give answer:


I. x2 - 15x + 54 = 0
II. y2 - 23y + 132 = 0

Options

A

if x ≥ y

B

if x > y

C

if x ≤ y

D

if x < y

Show Answer

Correct Answer :

Option D

if x < y

if x < y

Solution :

To find the relationship between x and y, we need to solve the two given quadratic equations separately.

Step 1: Solve Equation I
The first equation is:
x2-15x+54=0

To solve this by factorization, we need to find two numbers that multiply to 54 and add up to -15. These numbers are -6 and -9.
Splitting the middle term, we get:
x2-6x-9x+54=0
x(x-6)-9(x-6)=0
(x-6)(x-9)=0

This gives the roots:
x=6 or x=9

Step 2: Solve Equation II
The second equation is:
y2-23y+132=0

We need to find two numbers that multiply to 132 and add up to -23. These numbers are -11 and -12.
Splitting the middle term, we get:
y2-11y-12y+132=0
y(y-11)-12(y-11)=0
(y-11)(y-12)=0

This gives the roots:
y=11 or y=12

Step 3: Compare the values of x and y
Comparing the roots:
- For x=6: both y=11 and y=12 are greater (i.e., 6<11 and 6<12).
- For x=9: both y=11 and y=12 are greater (i.e., 9<11 and 9<12).

Since every value of x is strictly less than every value of y, we conclude that x<y.

Therefore, the correct relationship is if x < y.

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