3 years ago

N order to write an expression like (5x + 4)3 in expanded form, it helps to look at (5x + 4) as just one number, n.

1 answer:

6 0

The expression (5x + 4)^3 in expanded form is 125 x3 + 300 x2 + 240 x + 64. The expression will have also a root of x = -4/5. This is the form of trinomial expansion and can be solve by multiplying the the term 3 times.

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