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Question

What should be added to 2x2−3y2 to get x2+3y2+2xy?

A
x26y22xy
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B
x2+6y2+2xy
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C
x26y2+2xy
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D
x2+6y2
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Solution

The correct option is B x2+6y2+2xy

We have to find what should be added to 2x23y2 to get x2+3y2+2xy
If we subtract 2x23y2 form x2+3y2+2xy we will get our expression.

(x2+3y2+2xy)(2x23y2)
Step 1: Open the brackets and change the sign of 2nd expression
x2+3y2+2xy2x2+3y2
Step 2: Group the like terms
(x22x2)+(3y2+3y2)+2xyx2+6y2+2xy

Hence, option B is correct.


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