Can someone please help me???
1 answer:
Answer: Choice C) Britney is correct. Gabrielle multiplied -4 and -6 to get -24 but should have gotten 24
Both students used the FOIL rule correctly (FOIL stands for "first, outer, inner, last" to help remember how to multiply out two binomials), except of course Gabrielle's mistake getting -24. The FOIL rule is basically 2 applications of the distributive property. You can also use the box method to visually organize the terms. See the attached image for the box method.
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Answer:
Multiply row 2 by-1 and add it to row 3.
Step-by-step explanation:
The given augmented matrix is
The permissible row operations are:
1. Switching rows
2. Multiplying a row by a nonzero constant.
3. Adding/Subtracting two rows
Therefore the correct option is: Multiply row 2 by-1 and add it to row 3.