Question

Find the sum and difference functions f+g and f−g for the functions given:
a. f(x)=x2−2x−2 and g(x)=3x+2
b. f(x)=9−x2 and g(x)=5x2+2x+1
c. f(x)=2x square root 5+4 and g(x)=x2+2x square root 5−1

Answer 1

@surjithayer

Answer 2

step by step answer please :)

Answer 3

(f+g)(x)=f(x)+g(x)=x^2-2x-2+3x+2=x^2+x

Answer 4

is that everything ?

Answer 5

yes, similarly for others.

Answer 6

can you do part b please ?

Answer 7

b. i solve f-g
(f-g)(x)=f(x)-g(x)=9-x^2-(5x^2+2x+1)=9-x^2-5x^2-2x-1=-6x^2-2x+8

Answer 8

6x^2-2x+8 is the final answer right?

Answer 9

no ,-6x^2-2x+8

Answer 10

oh yes sorry

Answer 11

and how about part c? Im doing part e,f,g on my own dw

Answer 12

the square roots confuse me @surjithayer

Answer 13

ok can you keep going with it ??

Answer 14

f(x)=2x(sqrt5)+4,g(x)=x^2+2x(sqrt5)-1
(f+g)(x)=f(x)+g(x)=2x(sqrt5)+4+x^2+2x(sqrt5)-1=x^2+4x(sqrt5)+3

Answer 15

thanks so much !! :D

Answer 16

yw