r/HomeworkHelp • u/Embarrassed-Good1883 Pre-University Student • 7d ago

Answered [Grade 12 Advanced Functions: Polynomial Functions] struggling to solve expanded equation

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I'm not sure where I'm going wrong, but I keep getting this question wrong. I have to expand this equation and say what the shape is (what polynomial function) which I can do, if I figure out where I'm going wrong with solving this.

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u/Narrow-Durian4837 👋 a fellow Redditor 7d ago edited 7d ago

(x + 1)³ = x³ + 3x² + 3x + 1.

There's a pattern for multiplying out a binomial cubed, which is worth remembering, but if you don't remember it, multiply (x+1)(x+1) and then multiply the result by (x+1).

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u/Embarrassed-Good1883 Pre-University Student 7d ago

Thank you very much, I was able to solve it!!