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Mathematics, 09.03.2021 02:00 SiegeHatake4534
Penelope determined the solutions of the quadratic function by completing the square.
f(x) = 4x2 + 8x + 1
–1 = 4x2 + 8x
–1 = 4(x2 + 2x)
–1 + 1 = 4(x2 + 2x + 1)
0 = 4(x + 2)2
0 = (x + 2)2
0 = x + 2
–2 = x
What error did Penelope make in her work?
Penelope should have subtracted 1 from both sides instead of adding 1.
Penelope should have subtracted 4 from both sides instead of adding 1.
Penelope should have added 4 to both sides instead of adding 1.
Penelope should have subtracted 8 from both sides instead of adding 1.
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You know the right answer?
Penelope determined the solutions of the quadratic function by completing the square.
f(x) = 4x2 +...
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