Multiply:
(√[3] + 4√[5])(2√[3] – √[5])
2006-11-26 13:28:41 · 5 answers · asked by jackson32s 1 in Education & Reference ➔ Homework Help
use the FOIL method (first, outside, inside, last) to multiply it out:
2*3 - sqrt(15) + 8sqrt(15) - 4*5
= 7sqrt(15) - 14
2006-11-26 13:37:06 · answer #1 · answered by banjuja58 4 · 0⤊ 0⤋
This exercise utilizes the order of arithimetic operations. Arithematical operations must be done in this order: paranthesis, Exponents, Multiplication, Division, Addition, and finally, Subtraction. A way to remember the order is to use the first letter of the following phrase as a reminder of the order of operations: Please Excuse My Dear Aunt Sally.
For your question:
Step1 - work out what is in the left parenthesis first maintaining the order of operations:
4â[5])=8.94
â[3=1.73
8.94+1.73=10.67
Step 2 - work out what is in the right parenthesis maintaining the order of operations.
Step 3 - multiply the answers from Step 1 and Step 2 to get the final answer.
2006-11-26 22:03:23 · answer #2 · answered by tamaralhill3 2 · 1⤊ 1⤋
Free your...has the right idea. Multiply the first two terms, then add the product of the outside terms, then add the product of the inside terms, then add the product of the last two terms.
2006-11-26 21:42:42 · answer #3 · answered by salsera 5 · 0⤊ 0⤋
Just use FOIL -- first, outside, inside, last
2006-11-26 21:34:47 · answer #4 · answered by Anonymous · 0⤊ 0⤋
I believe the answer is 13.11088342
2006-11-26 21:34:05 · answer #5 · answered by suz' 5 · 0⤊ 0⤋