Question

Expand the following:
i) (5-x)³
ii) (2x-4y)³
iii) (ab-c)³

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Answer 1

Answer:

i)(5-x) + (5-x) + (5-x)

ii)(2x-4) + (2x-4) + (2x-4)

iii)(ab-c) + ( ab-c) + (ab-c)

Step-by-step explanation:

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Answer 2

Answer:

i) (5-x) ^3 = 5^3 - 5^2*x + 5*x^2 - x^3

= 125 - 25x + 5x^2 - x^3

ii) (2x-4y) ^3 = 2x^3 - 2x^2*4y + 2x*4y^2 - 4y^3

= 8x^3 - 16x^2y + 32xy^2 - 64y^3

iii) (ab-c) ^3 = ab^3 - ab^2*c + ab*c^2 - c^3

= ab^3 - ab^2c + abc^2 - c^3

Step-by-step explanation:

The formula for (a-b)^3 is = a^3 - a^2*b + a*b^2 - b^3

You just need to replace your numbers with this formula.

In this ^ = root and * = multiply

I hope the explanation is helpful