The function f(x) is defined as f(x) = 3x² - 5 for all real numbers x.

What is f(-4) ?

A.) -149

B.) -53

C.) -29

D.) 43

E.) 139

What is f(-4) ?

A.) -149

B.) -53

C.) -29

D.) 43

E.) 139

Simply substitute -4, in for x, into the function:

f(-4) = 3(-4)² - 5 {substitued -4 in for x}

= 3(16) - 5 {squared the -4}

= 48 - 5 {multiplied 3 by 16}

=

f(-4) = 3(-4)² - 5 {substitued -4 in for x}

= 3(16) - 5 {squared the -4}

= 48 - 5 {multiplied 3 by 16}

=

**43**{subtracted}**D.)***- Algebra House*