How do you simplify #(x+9)(x+2)#?
3 Answers
Apr 5, 2018
Explanation:
USE FOIL:
FIRST: Multiply
OUTSIDE: Multiply
INSIDE: Multiply
LAST: Multiply 9 by 2 to get 18
Then add each answer together to get
Which simplifies to
Apr 6, 2018
Explanation:
Apr 6, 2018
Explanation:
We can simplify thus using the highly useful mnemonic FOIL, standing for Firsts, Outsides, Insides, Lasts. You'll see we'll multiply the first terms, outside terms, inside terms and last terms. Here's a breakdown:
- First terms:
#x*x=color(blue)(x^2)# - Outside terms:
#x*2=color(blue)(2x)# - Inside terms:
#9*x=color(blue)(9x)# - Last terms:
#9*2=color(blue)(18)#
Thus, we have:
Which simplifies to
Hope this helps!