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7nadin3 [17]
2 years ago
14

Factorise ab-a-b+1 =?

Mathematics
2 answers:
dexar [7]2 years ago
7 0

Answer: a(b - 1) -1 (b - 1)

(a - 1)(b - 1)

Step-by-step explanation:

Rufina [12.5K]2 years ago
7 0

Answer:

ab-a-b+1

For this equation there are no like terms!

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-8(r-2)=40 what is the answer to this equation
Elena-2011 [213]
The answer is r=-3. You use the distributive property which is basically multiplying -8 with all the numbers inside the parenthesis. So -8 x r and -8 x -2. This results to -8r+16=40 (Two negative numbers multiplied together will form a positive number). We use inverse operations to subtract 16 from both sides. 16-16 is 0 and 40-16 is 24. So we are left with -8r=24. We want to be left with only r, so we once again use inverse operations to divide -8 from both sides. -8/-8 is 1, and 24/-8 is -3. So we end up with r=-3. Hope this helped :]
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