Two sets of quadratic expressions are shown below in three different forms:
Line 1: x2 +...
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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