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

asked Aug 5, 2022 193k views

2 votes

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

correct answer?

by Roxy

9.0k points

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4 votes

Answer:

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

The correct answer is:

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

Taymour answered Aug 10, 2022

7.8k points

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