Question

1.If f(x)=x² +5, find f(x+2)-f(x-2)​

Answer 1

Answer:

$4x$

Step-by-step explanation:

= $(x+2)^2+5-((x-2)^2+5)$

= $x^2+2x+4+5-(x^2-2x+4+5)$

= $x^2+2x+4+5-x^2+2x-4-5$

x^2 , 4, 5 are cancelled out

so,

$2x+2x$ = $4x$

Hope it helps.