Lisa solves a quadratic equation as shown below. 6 = x2 + 2x - 8
6 = (x+4)(x-2)
6 = x + 4 and 6 = x-2
X = 2 and x = 8
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A The 6 should have been subtracted from both 6 and x2 + 2x - 8 before factoring.
B The last line should be x = 2 or x = 8.
Only (x + 4) or (x - 2) should be set equal to 6, not both factors.
D The 6, 2, and -8 should be simplified to 3,1, and
before factoring.