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SAI International School

                                            CLASS – VIII, SUB: MATH
                                             HOME ASSIGNMENT-10

                                       CHAPTER-14: FACTORISATION
           SUBTOPIC:
                      Rules to find the errors
           Home Assignment-


           1. Find and correct the errors in the following mathematical statement. Substituting x = −3 in

           (a) x + 5x + 4 gives (−3) + 5 (−3) + 4 = 9 + 2 + 4 = 15
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           (b) x − 5x + 4 gives (−3) − 5 (−3) + 4 = 9 − 15 + 4 = −2
           (c) x + 5x gives (−3) + 5 (−3) = −9 − 15 = −24
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           2. Find and correct the errors in the statement: (z + 5) = z + 25
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           3. Find and correct the errors in the statement: x + 2x + 3x = 5x

           4. Find and correct the errors in the statement: 5y + 2y + y − 7y = 0
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