Question Details

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


I. 2x27x+3=0
II. 4y27y+3=0

Options

A

if x ≥ y

B

if x > y

C

if x ≤ y

D

if x < y

E

x = y or no relation can be established between x and y

Show Answer

Correct Answer :

Option E

x = y or no relation can be established between x and y

x = y or no relation can be established between x and y

Solution :

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

Step 1: Solve the first equation for x:

2x27x+3=0

We can solve this quadratic equation by factoring. We look for two numbers that multiply to 2×3=6 and add up to 7. These numbers are 6 and 1.
Split the middle term:

2x26xx+3=0

Factor by grouping:

2x(x3)1(x3)=0

(2x1)(x3)=0

This gives two possible values for x:

x=12=0.5
or
x=3

Step 2: Solve the second equation for y:

4y27y+3=0

Similarly, we look for two numbers that multiply to 4×3=12 and add up to 7. These numbers are 4 and 3.
Split the middle term:

4y24y3y+3=0

Factor by grouping:

4y(y1)3(y1)=0

(4y3)(y1)=0

This gives two possible values for y:

y=34=0.75
or
y=1

Step 3: Compare the values of x and y:

Let's compare the roots:
- If x=0.5 and y=0.75, then x<y.
- If x=3 and y=1, then x>y.

Since we have cases where x<y and cases where x>y, no consistent relationship can be established between x and y.

Therefore, the correct option is x = y or no relation can be established between x and y.

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