(x²+3x)²-(x²+3x)-6
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Answer:
x^4 + 6x³ +8x²+3x-6
Step-by-step explanation:
(x²+3x)²-(x²+3x)-6
= (x²)² + 2*x²*3x + (3x)²- x² + 3x -6
= x^4 + 6x³ + 9x² -x² +3x-6
= x^4 + 6x³ +8x²+3x-6
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