IQR=36-16.. which would give you 20!
7 14/18 since you can reduce this to 7 7/9:)
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
