192k views
1 vote
Factor 2x4 - 20x2 - 78.

User Shrewd
by
8.6k points

2 Answers

5 votes

Answer:

2(x² + 3)(x² - 13)

Explanation:

2x⁴ - 20x² - 78

Factor out 2.

2(x⁴ - 10x² - 39)

Find 2 numbers that multiply to get -39 and add to get -10. Those numbers are -13 and 3.

2(x⁴ - 13x² + 3x² - 39)

2(x² + 3)(x² - 13)

User Radpotato
by
8.1k points
6 votes

Answer:

2x⁴ - 20x² - 78

To factor the expression look for the LCM of the numbers

LCM of the numbers is 2

Factorize that one out

That's

2( x⁴ - 10x² - 39)

Hope this helps

User Davidhq
by
8.3k points

Related questions

asked Jun 3, 2020 126k views
Hiba asked Jun 3, 2020
by Hiba
7.3k points
1 answer
4 votes
126k views
1 answer
2 votes
41.6k views