SOLUTION: 3x^2-x-4

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Question 61443This question is from textbook Algebra 1
: 3x^2-x-4 This question is from textbook Algebra 1

Answer by tutorcecilia(2152) About Me  (Show Source):
You can put this solution on YOUR website!
3x^2-x-4 [use the quadratic formula to solve]
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
.
x+=+%28-%28-1%29+%2B-+sqrt%28+%281%29%5E2-%284%2A3%2A-4%29+%29%29%2F%282%2A3%29+[plug-in the values]
x+=+%28%281+%2B-+sqrt%28+%281-%28148%29+%29%29%2F6%29%29+
x+=+%28%281%29+%2B-+sqrt%28+49%29%29%2F6%29%29+
x+=+%28%281%29+%2B+7%29%2F6%29%29+=1.333
x+=+%28%281%29+-+7%29%2F6%29%29+=-1
.
So, x = -1 or x = 1.333