Can you demonstrate an easier problem? I have problems like 42r - 18 to factor.
Md Ariful Islam
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Dr. Md Rushad Rahman
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Find a common factor of 42r and 18, e.g. 6. This number will go on the outside of the bracket so 6(...). Then divide the original number(s) you had by 6. We end up with 7r-3. This will go on the inside of the bracket to make the final answer: 6(7r-3). You can check your answer by expanding the brackets again: if the answer matches what you started with, then the answer is correct!
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