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Mathematics, 09.03.2020 03:49 maryanapritchak1829

Cedric completed the square for the quadratic expression 5x^2βˆ’40x+15 in order to determine the minimum value of the expression, as shown.
Step 1: 5(x^2βˆ’8x+3)
Step 2: 5(x^2βˆ’8x+16βˆ’16+3)
Step 3: 5((x+4)^2βˆ’16+3)
Step 4: 5((x+4)^2βˆ’13)
Step 5: 5(x+4)^2βˆ’65
What mistake, if any, did Cedric make?

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Answers: 2

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Cedric completed the square for the quadratic expression 5x^2βˆ’40x+15 in order to determine the minim...
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