Let f(y) = y^2- ky - 5. If f(2) = 7, then k
1 answer:
Answer:
Step-by-step explanation:
So we have the function:
And we know that f(2)=7 and we want to find k.
So, substitute 2 for y and 7 for f(y). Thus:
Evaluate the square:
Subtract:
Add 1 to both sides:
Divide both sides by -2:
So, the value of k is -4.
And we're done!
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