Subtract the product of 3x-4yand3x+4yfrom 9x²+12xy-16y².also find the value for x=1 and y= 2 for final result
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So, first let us multiply the terms and find the product...
= ( 3x - 4y ) X ( 3x + 4y )
= ( 3x ) ² - ( 4y ) ² ( Using Identity )
= ( 9x² ) - ( 8y² )
Now, let's do the Subtraction part...
= 9x²+12xy-16y² - ( 9x² - 8y²)
= 9x²+12xy-16y² - 9x² + 8y²
= 12xy - 8y² Ans.
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