SOLUTION: If f(x) = 3x^2 - Bx + 4, and f(-1) = 12, what is the value of B?
Let me give it a try.
Let x = -1 and f(-1) be 12.
3(-1)^2 - B(-1) + 4
12 = 3(-1)^2 -B(-1) + 4
Algebra.Com
Question 1208026: If f(x) = 3x^2 - Bx + 4, and f(-1) = 12, what is the value of B?
Let me give it a try.
Let x = -1 and f(-1) be 12.
3(-1)^2 - B(-1) + 4
12 = 3(-1)^2 -B(-1) + 4
12 = 3(1) + B + 4
12 = 3 + B + 4
12 = B + 7
12 - 7 = B
5 = B
You say?
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
means that the point (-1,12) is a point on the function f.
Use that known point for x and f(x).
----------and could have been done in one or two fewer steps.
Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
.
Your solution is good, correct and perfect.
My congratulations - you did a perfect job !
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