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31-07-2019
Mathematics

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What is the value of the product (3-21) (3 + 21)?

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31-07-2019

Multiply the two brackets together

(3-21)(3+21)

(3)(3)(3)(+21)(-21)(3)(-21*21)

9+63-63-441

- 441 because whenever multiplying a - negative number and a + positive number = - negative number

9-441

= -432

Answer: -432

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