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3 years ago

Clara simplifies (8b-4r)-(2b-r) and says the result is 6b-5r. What error did Clara make?

Mathematics

2 answers:

Mariulka [41]3 years ago

7 0

Clara forgot to distribute the - sign to- (2b-r) through all the terms the answer would be 6b+3r

mixas84 [53]3 years ago

6 0

Answer:

Clara makes error after opening the bracket she did not changes the sign of r .

Correct simplification of (8b-4r)-(2b-r) is 6b- 3r .

Step-by-step explanation:

As given the expression in the question be

= (8b-4r)-(2b-r)

Open the bracket

= 8b - 4r - 2b + r

Solving the above

= 6b - 3r

Clara makes error after opening the bracket she did not changes the sign of r .

Therefore the correct simplification of (8b-4r)-(2b-r) is 6b- 3r .

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