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ACT Mathematics Videos 164 videos
ACT Math: Coordinate Geometry Drill 1, Problem 1. Which inequality is expressed by the number line?
ACT Math: Intermediate Algebra: Drill 3, Problem 1. Find the fifth number in the series.
ACT Math: Pre-Algebra Drill 1.2. What proportion of Jenna's day is spent Wii-swimming?
ACT Math 1.2 Intermediate Algebra 695 Views
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Description:
ACT Math Intermediate Algebra Drill 1, Problem 2. Find the product of (2a + 6) 2 .
- Intermediate Algebra / Binomials
- Product Type / ACT Math
- Foreign Language / Arabic Subtitled
- Foreign Language / Korean Subtitled
- Foreign Language / Spanish Subtitled
- Foreign Language / Chinese Subtitled
- Number and Quantity / Perform arithmetic operations with complex numbers
- Number and Quantity / Use complex numbers in polynomial identities and equations
- Number and Quantity / Perform arithmetic operations with complex numbers
- Number and Quantity / Use complex numbers in polynomial identities and equations
- Intermediate Algebra / Roots of polynomials
Transcript
- 00:02
And here's another shmoop de jour...
- 00:04
Find the product: quantity 2a plus 6 squared.
- 00:07
And here are the potential answers...
- 00:12
OK so what is this question asking?
- 00:14
FOIL, baby!
Full Transcript
- 00:16
Anyway... as we hopefully recall, FOIL is all about first, outside, inside, last...
- 00:21
and in this case we just multiply the stuff in parentheses... by itself.
- 00:26
We get quantity 2a plus 6 times 2a plus 6.
- 00:30
So the 2a times 2a gets us 4a squared.
- 00:33
Then the outsides are 2a times 6, which is 12a... we add this to the insides, which are
- 00:38
2a times 6 for a total of 24a.
- 00:41
The end is 6 times 6 which is 36...
- 00:43
So the answer is E.
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