Question Details

Directions: Solve the two equations and compare the values of x and y.

I. 2x2-14x+24=0

II. y2+5y+6=0

Options

A

If x = y or no relation can be established

B

If x is less than or equal to y

C

If x is greater than y

D

If x is less than y

E

If x is greater than or equal to y

Show Answer

Correct Answer :

Option C

If x is greater than y

Solution :

Correct Answer: If x is greater than y

To compare the values of x and y, we need to solve both quadratic equations step-by-step.

Step 1: Solve Equation I for x

The first equation is given as:

2x2-14x+24=0

Divide the entire equation by 2 to simplify:

x2-7x+12=0

Factorize the quadratic equation by finding two numbers that multiply to give 12 and add up to -7. These numbers are -3 and -4:

x2-3x-4x+12=0

x(x-3)-4(x-3)=0

(x-3)(x-4)=0

Set each factor equal to zero to find the roots for x:

x-3=0x=3

x-4=0x=4

Thus, the values of x are 3 and 4.

Step 2: Solve Equation II for y

The second equation is given as:

y2+5y+6=0

Factorize the quadratic equation by finding two numbers that multiply to give 6 and add up to 5. These numbers are 2 and 3:

y2+2y+3y+6=0

y(y+2)+3(y+2)=0

(y+2)(y+3)=0

Set each factor equal to zero to find the roots for y:

y+2=0y=-2

y+3=0y=-3

Thus, the values of y are -2 and -3.

Step 3: Compare the values of x and y

Comparing each value of x with each value of y:
- For x = 3: 3 > -2 and 3 > -3
- For x = 4: 4 > -2 and 4 > -3

In all cases, every value of x is strictly greater than every value of y.

Hence, the correct conclusion is If x is greater than y.

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