Mathematics, 23.05.2020 03:57 summer132

Two sets of quadratic expressions are shown below in three different forms:

Line 1: x2 + x − 12 (x + 4)(x − 3) (x + 0.5)2 − 12.25
Line 2: x2 − x − 2 (x + 1)(x − 2) (x − 0.5)2 − 2.5

Which line contains three equivalent expressions? (2 points)

Group of answer choices

Line 1 only

Line 2 only

Both Line 1 and Line 2

Neither Line 1 nor Line 2

Solve 3x2 + 18x + 15 = 0 by completing the square. (2 points)

Group of answer choices

3(x + 3)2 = 6; x = −3 + square root 2 , x = −3 − square root 2

3(x + 9)2 = 12; x = −11, x = −7

3(x + 3)2 = 12; x = −5, x = −1

3(x + 9)2 = 228; x = −9 + square root 76 , x = −9 − square root 76

Quentin attempted to solve a problem by completing the square. Identify the line where he made his mistake. (2 points)

f(x) = 2x2 − 8x + 10
Line 1: f(x) = 2(x2 − 8x) + 10
Line 2: f(x) = 2(x2 − 8x + 16) + 10 − 32
Line 3: f(x) = 2(x − 4)2 − 22

Group of answer choices

Line 1

Line 2

Line 3

He did not make any mistakes

Answers: 3

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Two sets of quadratic expressions are shown below in three different forms:

Line 1: x2 +...

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