(3x + 5.5) (3x -0.5) please help me It's very urgent
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(3x+5.5)(3x+−0.5)
=(3x)(3x)+(3x)(−0.5)+(5.5)(3x)+(5.5)(−0.5)
=9x2−1.5x+16.5x−2.75
=9x2+15x−2.75
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