2006-08-23 08:24:12 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Use FOIL for the first part.
(a^2 - 4)(a^2 +9) = a^4 +9a^2 - 4a^2 - 36 = a^4 +5a^2 - 36
Then combine like terms
a^4 +5a^2 - 36 - a - 3
= a^4 + 5a^2 - a - 39
2006-08-23 08:26:38 · answer #1 · answered by MsMath 7 · 0⤊ 0⤋
( a^2 - 4 )( a^2 + 9 ) - ( a + 3 )
= a^4 + 9a^2 - 4a^2 - 36 - a - 3
= a^4 + 5a^2 - a - 39
2006-08-23 17:48:42 · answer #2 · answered by cyrus 2 · 0⤊ 0⤋
you use the FOIL method and you should get...
a^4 + (9a^2 - 4a^2) - 36 - (a+3)
then you should be able to simplify the rest by combining like terms..
a^4 + 5a^2 - 36 - a - 3
Answer: a^4 + 5a^2 - a - 39
next time you should give it a try... you can do it! :]
2006-08-23 15:31:46 · answer #3 · answered by dolphini2007 2 · 0⤊ 0⤋
first multiply the parenthesis:
(a^2-4)(a^2+9)= a^4+9a^2 -4a^2-36
=a^4+5a^2-36
then subract (a+3) from the previous answer:
a^4+5a^2-36 -a-3=
=a^4+5a^2-a-39
remember: you must multiply each term of the last parenthesis times "-1"!!!
2006-08-23 16:39:57 · answer #4 · answered by sbdy 1 · 0⤊ 0⤋
(a^2 - 4)(a^2 + 9) - (a + 3)
(a^4 + 9a^2 - 4a^2 - 36) - a - 3
a^4 + 5a^2 - 36 - a - 3
a^4 + 5a^2 - a - 39
2006-08-23 16:17:18 · answer #5 · answered by Sherman81 6 · 0⤊ 0⤋
a^4 + 5a^2 - 36 -a -3
a^4 + 5a^2 -a -39
2006-08-23 15:27:36 · answer #6 · answered by bob h 3 · 0⤊ 0⤋