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19 February, 20:13

If F1 = - 5x + 4, F2 = - 6x - 5 and F3 = - 9x + 2 then simplify F1 * F2 - F3 in terms of x.

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  1. 19 February, 20:36
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    f1*f2-f3 = (-5x+4) * (-6x-5) - (-9x+2) = 30x^2-24x+25x-20+9x-2=30x^2+10x-22 = (5x+1) ^2-23
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