Math, asked by sabbutv2gmailcom, 8 hours ago

solve (3x+y)^2 - (3x-y)^2​

Answers

Answered by sahanjani82
3

Step-by-step explanation:

Use the indentities (a + b)² = a²+ b² +2ab

And. (a - b)² = a²+ b² +2ab

So, using the indentity

(3x + y)² - (3x - y)²

= (3x² + y²+23xy) - (3x² + y² -23xy)

= (3x²+y²+6xy) - (3x²+y²-6xy)

= 3x² +y² +6xy -3x² -y² +6xy

= 12xy Ans.

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