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## Comment on

FOIL Method for Expanding## For the last ques from Math

Is x^2 > y^2?

(1) x + y = 2

(2) x > y

How is the OA C? my explanation:

-Assume 1 and 2 are not suff on their own

-1+2)

x= 2, y= 0 (satisfying 1 and 2) --> Yes, 4 > 0

x= 2, y= -4 (satisfying 1 and 2) --> No, 4 is not greater than 16

Shouldn't the answer be E???

## x= 2, y= -4 does not satisfy

x= 2, y= -4 does not satisfy statement 1

## Brent, since statement 2

## "...since statement 2 clearly

"...since statement 2 clearly states that x > y, it should be true for x^2 > y^2..."

That's not true. Here's a counter-example:

x = -3 and y = 1

Here, x < y, but it is NOT the case that x² < y².

If x = -3, then x² = (-3)² = 9

If y = 1, then y² = (1)² = 1

So, x² is greater than y²

Cheers,

Brent

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