Answer:
0.349
Step-by-step explanation:
x^2 - 3x - 40
x = 8 and x = -5
x - 8 = 0 and x + 5 = 0
(x - 8)(x + 5)
x^2 + 5x - 8x - 40
Answer: x^2 - 3x - 40
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