Iv computation 10 points a directions solve the

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IV. Computation (10 points) A. Directions: Solve the quadratic equation below by completing the square. ( 2 points each) a. x 2 4 x + 3 = 0 Solution: b. x 2 + 10 x =− 9 B. Directions: Solve the quadratic equation using the quadratic formula. (2 points each) a. x 2 + 3 x 10 = 0 Solution: b. 2 x 2 + x 6 = 0 Solution: c. x 2 2 x 24 = 0 Solution: V. Supply Type (explanation) (5 points each) Directions: Read the situations below then answer the questions that follow.
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1. Two students were asked to solve the equation, 5 ( x 2 ) 2 = 20 using the square root property. Their solutions and answers are shown below. Student A Solution: 5 ( x 2 ) 2 = 20 5 ( x 2 ) 2 = 20 5 ( x 2 )= 20 x 2 = 20 5 x = 2 ± 20 5 Answer: x = 2 + 20 5 x = 2 20 5 Student B Solution: 5 ( x 2 ) 2 = 20 ( x 2 ) 2 = 20 5 ( x 2 ) 2 = 4 ( x 2 ) 2 = 4 x 2 = 2 ± 2 Answer: x = 2 + 2 x = 4 x = 2 2 x = 0 Questions: Who has the correct solution and answer? Student A or Student B? Justify your answer by showing your own solution. 2. The length of a rectangular garden is 6 more than its width. If the area is 27 square units, what are the dimensions of the garden? Show your complete solutions and explain your answer.
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Solution: Explanation: CRITERIA 1 2 3 4 5 CONTENT Ideas are clearly explained using appropriate mathematical terms. Ideas are clearly explained but only some mathematical terms are presented. Ideas are not clearly explained and the mathematical terms are not appropriate. The ideas presented are not clearly explained. The ideas presented are incorrect and irrelevant.
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  • Spring '16
  • Leonardo Dumadag
  • Quadratic equation, Elementary algebra, Test Analysis, A. Linear Equation

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