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Mathematics, 03.05.2021 18:20 babyphoraaaaa

If ( 4x - 2 ) ( x + 9 ) - 3x = ax2 + bx + c, what is the value of b. The 2 is and exponent please help me 

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If ( 4x - 2 ) ( x + 9 ) - 3x = ax2 + bx + c, what is the value of b. The 2 is and exponent please he...
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