PLease help me on 57 - 63
1 answer:
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It looks like you had some of the numbers correct, but you just labeled it and rounded it incorrectly, and the teacher gave you super partial credit for it.
For my work, I'm assuming that side A is opposite of angle A and side B is opposite of angle B, etc...
The first step for solving this expression is to distribute 
through the first set of parenthesis.
× (x - 9)
Now use the FOIL method to multiply each term in the first parenthesis by each term in the second parenthesis. This will look like the following:
x × x - x × 9 - x - × (-9)
Remember that multiplying two negatives together equals a positive,, so the expression changes to:
x × x - x × 9 - x + × 9
Calculate the product of all of the sets of multiplication to make the expression become:
x² - 
x - x +
Lastly,, calculate the difference of -x - x to find your final answer.
x² - 
x +
Let me know if you have any further questions.
:)
Now use the FOIL method to multiply each term in the first parenthesis by each term in the second parenthesis. This will look like the following:
Remember that multiplying two negatives together equals a positive,, so the expression changes to:
Calculate the product of all of the sets of multiplication to make the expression become:
Lastly,, calculate the difference of -
Let me know if you have any further questions.
:)