Question

3.
If f(x) = x2 + 5x + 7, then the value of x for
which f(x) = f(x + 1) is
(A) 3
(B) -6
(C) -3
(D) 6
5.

Answer 1

Step-by-step explanation:

since f(x) = f(x+1) -

x² + 5x + 7 = x² + 2x + 1 + 5x + 5 + 7

5x + 7 = 7x + 13

2x = - 6

x = -3

Hence the correct option is -3 (Option C)

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