dylan4988 dylan4988

20-01-2021
Mathematics

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show that (X+1)(x+3)(x+5)=ax3+bx2+cx+d

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nguyenjennie41 nguyenjennie41

20-01-2021

Answer:

a = 1

b = 9

c = 23

d = 15

Step-by-step explanation:

Expand it out:

(x^2 + 4x + 3)(x+5)

(x^3 +4x^2 +3x + 5x^2 + 20x + 15)

=x^3 + 9x^2 + 23x +15

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