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A

Anonymous

Dec 04, 2024

Need help on how to expand (X+H)^4!!?

Hello,

I’m trying to simplify and work through the expression (\frac{(x+h)^4 - x^4}{h}). I would greatly appreciate a detailed explanation along with the solution, as I’m struggling to figure it out. Additionally, I need help expanding ((x+h)^4). I've come across some general formulas for expanding powers of binomials, but I’m not sure how to apply them here.

Thank you very much for your help!

6 Answers

(x + h)⁴ = x⁴ + 4x³h + 6x²h² + 4xh³ + h⁴

the powers of the x decrease and the powers of the h increase

the coefficients come from pascals triangle

1

1 1

1 2 1

1 3 3 1

1 4 6 4 1

1 5 10 10 5 1

etc

These can also be found using combinations

nCr

(a + b)^n = ∑(r = 0 to n) nCr a^(n – r) b^r

A
Anonymous

Jan 30, 2025

Memorize Pascal’s triangle it will help a lot, multiplying all the terms out takes far too long. I’ve included a link so you can see what I’m talking about.

Expanding (x+h)^4 results in

(x^4+4x^3h+6x^2h^2+4xh^3+h^4-x^4)/h

Simplifies to (4x^3h+6x^2h^2+4xh^3+h^4)/h after subtracting the x^4 term.

Dividing by h results in 4x^3+6x^2h+4xh^2+h^3.

This is your final answer.

A
Anonymous

Dec 30, 2024

(x+h)^4=[(x+h)^2]*[(x+h)^2]

This is the long way to do it, but it works with any number of terms inside the parentheses and any power.

The general formula for binomial powers comes from combinatorial calculus.

Look up Pascal’s triangle for a simple way to derive the coefficients.

A
Anonymous

Jan 09, 2025

For the best answers, search on this site shorturl.im/awozz

Hi, (x + 4)(x + 3) = x(x + 3) + 4(x + 3) = x² + 3x + 4x + 12 = x² + 7x + 12 <==ANSWER I hope that helps!! ?

A
Anonymous

Jan 06, 2025

try looking up the pascals triangle, it will help you a lot

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