Question

Let f(x)= –5x + 3 and g(x) = 6x – 2. Find f•g and its domain.
1)–30x^2 + 28x – 6; all real numbers except x=1/3
2)–15x^2 – 8x – 12; all real numbers except x= 3/5
3)–30x^2 + 28x – 6; all real numbers
4)–15x^2 – 8x – 12; all real numbers

Please explain how you got it.

Answer 1

you must solve ( –5x + 3)*(6x – 2)

Answer 2

Do i multiply -5x by 6x and 3 by 2

Answer 3

(a+b)(c+d)=a(c+d)+b(c+d)=ac+ad+bc+bd

Answer 4

so its c

Answer 5

plz wait

Answer 6

yes that's true

Answer 7

ok thanks