Question Details

Directions: In the following question, two quadratic equations labeled I and II are provided. You are required to solve both equations to determine the relationship between x and y.



I. 2x2 + 16x + 32 = 0
II. 2y2 + 45y - 98 = 0

Options

A

x > y

B

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

C

x ≥ y

D

x < y

E

x ≤ y

Show Answer

Correct Answer :

Option B

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

Solution :

The correct answer is x = y or no relation can be established between x and y.

To determine the relationship between the two variables, we solve both quadratic equations step-by-step to find the roots for
x
and
y
.

Step 1: Solve Equation I for
x

Equation I is:

2x2+16x+32=0
Divide the entire equation by
2
to simplify:

x2+8x+16=0
This expression is a perfect square trinomial:

(x+4)2=0
Taking the square root on both sides:

x+4=0

x=-4
Thus, the roots for Equation I are
x=-4,-4
.

Step 2: Solve Equation II for
y

Equation II is:

2y2+45y-98=0
We factor the equation by splitting the middle term. We need two numbers whose product is
2×(-98)=-196
and whose sum is
45
.
The numbers are
49
and
-4
, since
49×(-4)=-196
and
49+(-4)=45
.
Rewrite the middle term:

2y2+49y-4y-98=0
Factor by grouping:

y(2y+49)-2(2y+49)=0

(2y+49)(y-2)=0
Equating each factor to zero:

2y+49=0y=-492=-24.5

y-2=0y=2
Thus, the roots for Equation II are
y=2
and
y=-24.5
.

Step 3: Compare
x
and
y

Now we compare the root
x=-4
with both values of
y
:
1. Comparing
x=-4
with
y=2
:

-4<2x<y
2. Comparing
x=-4
with
y=-24.5
:

-4>-24.5x>y

Since we obtain both
x<y
and
x>y
, no fixed 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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