The formula for exponential functions is:
y = ab^x
Considering the given function, the table is completed as follows:
x|y
-12|15
-6| 11
3|5
15|-3
<h3>Which is the function?</h3>
The function is defined by:
Hence, when x = -12:
When x = -6:
When x = 3:
When x = 15:
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Answer:
Step-by-step explanation:
Answer:
x = - 5, x = 4
Step-by-step explanation:
Given
f(x) = x² + x - 20
To find the zeros equate f(x) to zero, that is
x² + x - 20 = 0
Consider the factors of the constant term ( - 20) which sum to give the coefficient of the x- term ( + 1)
The factors are + 5 and - 4, since
5 × - 4 = - 20 and + 5 - 4 = + 1, hence
(x + 5)x - 4) = 0 ← in factored form
Equate each factor to zero and solve for x
x + 5 = 0 ⇒ x = - 5
x - 4 = 0 ⇒ x = 4
