8. What is the general form of (x-3)2 + (x+5)2 = 20?
A.2x2 + 4x +14 = 0 B. 2x2 + 4x -14 = 0 C. 2x2 - 4x +14 = 0 D. 2x2 - 4x -14 = 0
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8. What is the general form of (x-3)2 + (x+5)2 = 20?
A.2x2 + 4x +14 = 0 B. 2x2 + 4x -14 = 0 C. 2x2 - 4x +14 = 0 D. 2x2 - 4x -14 = 0
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Answer:
A
Step-by-step explanation:
[tex](x - 3)^{2} + (x + 5)^{2} = 20[/tex]
[tex]x^{2} - 6x + 9 + x^{2} + 10x + 25 = 20[/tex]
[tex]2x^{2} + 4x + 34 = 20[/tex]
[tex]2x^{2} + 4x + 34 - 20 = 20 - 20[/tex]
[tex]2x^{2} + 4x + 14=0[/tex]