Question Details

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


I. 6x2 + 5x + 1 = 0
II. 15y2 + 11y + 2 = 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 separately.

Step 1: Solve Equation I for x
The first equation is:
6x2+5x+1=0

We can solve this quadratic equation by splitting the middle term. We need two numbers that multiply to 6×1=6 and add up to 5. These numbers are 3 and 2.
6x2+3x+2x+1=0
Factor out the common terms from each pair:
3x(2x+1)+1(2x+1)=0
(3x+1)(2x+1)=0

This gives two possible values for x:
3x+1=0x=-13-0.33
2x+1=0x=-12=-0.50

So, the roots for x are x1=-0.33 and x2=-0.50.

Step 2: Solve Equation II for y
The second equation is:
15y2+11y+2=0

We need two numbers that multiply to 15×2=30 and add up to 11. These numbers are 6 and 5.
15y2+6y+5y+2=0
Factor out the common terms from each pair:
3y(5y+2)+1(5y+2)=0
(3y+1)(5y+2)=0

This gives two possible values for y:
3y+1=0y=-13-0.33
5y+2=0y=-25=-0.40

So, the roots for y are y1=-0.33 and y2=-0.40.

Step 3: Compare the values of x and y
Let us compare each value of x with each value of y:
- Comparing x=-0.33 and y=-0.33: here, x=y.
- Comparing x=-0.33 and y=-0.40: here, x>y (since -0.33 is greater than -0.40).
- Comparing x=-0.50 and y=-0.33: here, x<y (since -0.50 is less than -0.33).
- Comparing x=-0.50 and y=-0.40: here, x<y.

Since we have both x>y and x<y depending on which roots are selected, 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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