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?
a.) penelope should have subtracted 1 from both sides instead of adding 1.
b.) penelope should have subtracted 4 from both sides instead of adding 1.
c.) penelope should have added 4 to both sides instead of adding 1.
d.) penelope should have subtracted 8 from both sides instead of adding 1.