1 Solve using the square root method. x 2 = 64 A. {8} B. {-8, 8} C. {-16, 16} D.

Question

1

Solve using the square root method. x2 = 64 A. {8} B. {-8, 8} C. {-16, 16} D. {16}

2

First factor the trinomial as a binomial square and then use thesquare root method to solve. x2 - 20x + 100 = 36 A. {-6, 6} B. {-5/3, 5/3} C. {6, 10} D. {4, 16}
1

Solve using the square root method. x2 = 64 2

First factor the trinomial as a binomial square and then use thesquare root method to solve. x2 - 20x + 100 = 36 A. {-6, 6} B. {-5/3, 5/3} C. {6, 10} D. {4, 16} 2

First factor the trinomial as a binomial square and then use thesquare root method to solve. x2 - 20x + 100 = 36 A. {-6, 6} B. {-5/3, 5/3} C. {6, 10} D. {4, 16} 2

First factor the trinomial as a binomial square and then use thesquare root method to solve. x2 - 20x + 100 = 36 A. {-6, 6} B. {-5/3, 5/3} C. {6, 10} D. {4, 16} A. {8} B. {-8, 8} C. {-16, 16} D. {16}

2

First factor the trinomial as a binomial square and then use thesquare root method to solve. x2 - 20x + 100 = 36 A. {-6, 6} B. {-5/3, 5/3} C. {6, 10} D. {4, 16}

Explanation / Answer

(1) x2 = 64 --> x= ± 8 Answer: B. {-8, 8} (2)x2 - 20x + 100 = 36 --> x2 - 20x + 100 -36 = 0 --> x2 - 20x + 64 =0 --> (x2 - 20x +100) - 100 +64 =0 --> (x2 - 20x +100) - 36=0 --> (x-10)2=36 --> x-10 = ± 6 --> x = 10±6         =4 or 16 Answer: D. {4, 16}

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