A=(3x-5)²-64
=(3x)²-2*5*3x+5²-64
=9x²-30x+25-64
A=9x²-30x-39
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Verified answer
A=(3x-5)²-64
=(3x)²-2*5*3x+5²-64
=9x²-30x+25-64
A=9x²-30x-39
Verified answer
Bonjour,(3x - 5)² - 64
= 9x² + 30x + 25 - 64
= 9x² + 30x - 39