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Thursday, February 5, 2015

Common Mathematics errors committed by students of grade 9 and 10

1. If (x-2)(x-4)=7 then students write (x-2)=7 or (x-4)=7 as they do in case of (x-2)(x-4)=0 means either (x-2)=0 or (x-4)=0

2. While writing the value of 2x^2 at x=5, students write 25^2

3. They forget to take the negative sign of coefficient of x in x^2-5x+7

4. zero of a polynomial is misunderstood as 0 whereas zero of a polynomial can be any real number

5. In completing a square method of solving a quadratic equation  learners should ensure that the coefficient of x^ 2 is 1 and if it greater or less than 1, they should divide both sides by the coefficient of x^2 which is a in ax^2 + bx + c = 0.

6. The students have problem in computation and applying the quadratic formula. Examples of process skills errors committed by students involve the operation of addition, subtraction, multiplication and division. At the same time students also experienced difficulties in replacing the positive and negative sign, resulting in errors in using the formula.

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