1. Giles thinks that -5x²(3x - 4) simplifies to 15x² + 20x². Explain what mistakes he made. What is the correct answer?

Oleksii Aza asked Aug 19, 2022

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21 votes

1. Giles thinks that -5x²(3x - 4) simplifies to 15x² + 20x². Explain what mistakes he made. What is the

correct answer?

Oleksii Aza asked Aug 19, 2022

3.2k points

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25 votes

Answer:

The mistake was minus sign before the 15 and putting 15x² instead of 15x³.

The correct answer is:

$-5x^(2) (3x-4)\\ = -15x^(3) + 20x^(2)$

Ye Myat Min answered Aug 24, 2022

2.6k points

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