Factor: 5x 2 – 15x – 20. (a) 5(x-4)(x+1), (b) -2(x-4)(x+5), (c) -5(x+4)(x-1), (d) 5(x+4)(x+1).
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Expression = 5x2 - 15x - 20 = 5 ( x2 - 3x - 4) = 5( x - 4) ( x + 1 )
Answer = a
Answer = a
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