Question

if you have 7x^2 + 3 if the input is 4 what is the output

Answer 1

7x^2 + 3
7(4)^2 + 3
7(16) + 3
112 + 3
115.

Answer 2

$7x^2 + 3$   $x=4$ 

A Power is a short way to represent repeated multiplication. The power includes a base and an exponent. The base is the number that is multiplied. The exponent is the number of times the base is multiplied.

 Note: The power of a negative base is positive if the exponent is even, and negative if the exponent is odd.   

$7(4)^2 + 3$  $substitute \ 4 \ for \ x$ 

 $7*16+3$  $Simplify \ 4^2 \ to \ 16$ 

$112+3$ 

$= 115$