(2x^2+3x)(2 x^2+3x-6)+9 urgent!

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Grade: Education Subject: matematica
(2x^2+3x)(2 x^2+3x-6)+9 urgent!
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(2x²+3x)(2x²+3x-6)+9= 4x⁴+6x³-12x² +6x³+9x²-18x+9= 4x⁴+12x³- 3x² -18x+9