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Nitish Joshi

· started a discussion

· 1 Months ago

wrong answer (Question: 103986.0 )

(b) should be the answer as -8 are common in both and +9>+8

Question:
Directions : In the following questions two equations numbered I and II are given. You have to solve both the equations and Give Answer If

I. x2 – 72 = x

II. y2 = 64

Options:
A) x > y
B) x ≥ y
C) x < y
D) x ≤ y
E) x = y or the relationship cannot be established
Solution:

I. x2 – x – 72 = 0

⇒ x2 – 9x + 8x – 72 = 0

⇒ x (x – 9) + 8 (x – 9) = 0

⇒ (x + 8) (x - 9) = 0

∴ x = - 8 or 9

II. y2 = 64

⇒ y = √64 = ±8

Knowledge Expert

· commented

· 1 Months ago

Dear student
According to question
Given answer is correct
Please solve once again carefully
X : Y
-8 < 8
-8 = -8
9 > 8
9 > -8
So, we can not establish the relation between them.

Best wishes
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