16x²-72x+81 is perfect square of ———, Fill in the blanks to correct the given statement.
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Answer:
( 4x - 9 )²
Step-by-step explanation:
16x² - 72x + 81
= ( 4x )² - 2*4x*9 + 9²
*********************************
We know the algebraic identity:
a² - 2ab + b² = ( a - b )²
*********************************
= ( 4x - 9 )²
•••••
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