Question

H(x)=x²-5
Find h(-7)

Answer 1

h (-7) = 44

Explanation:

when working with a function, when we place a value, replacing x, in parentheses next to the function, we are to find the function by replacing x with that value.

Essentially, we need to replace x with -7. [replace meaning substitute]

h (x) = x² - 5

h (-7) = (-7)² - 5

h (-7) = 49 - 5

h (-7) = 44

so, h (-7) = 44

note: ² means to square a number (to multiply that number by itself)

(-7)² -> - 7 · - 7 = 49

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hope this helps!!

Answer 2

h(x) = 44

Explanation:

h(x) = x² - 5, h(-7) means x = -7

h(x) = (-7)² - 5

h(x) = 49 - 5

h(x) = 44