Did I get this right?
Let f(x) = 3x + 2 and g(x) =7x + 6. Find f ·g and its domain.

A.
21x^2 + 32x + 12; all real numbers

B.
21x^2 +32x + 12; all real numbers except x = -6/7

C.
6x^2 + 4x + 42; all real numbers except x = -2/3

D.
6x^2 + 4x + 42; all real numbers

My answer is A.

Question

Did I get this right?
Let f(x) = 3x + 2 and g(x) =7x + 6. Find f ·g and its domain.

  A.
21x^2 + 32x + 12; all real numbers

  B.
21x^2 +32x + 12; all real numbers except x = -6/7

  C.
6x^2 + 4x + 42; all real numbers except x = -2/3

  D.
6x^2 + 4x + 42; all real numbers

My answer is A.

zzr0ck3r · Answer

correct

yanasidlinskiy · Answer

Hahaha!!:D Ok. I was debating between A and B. Thanx:D

zzr0ck3r · Answer

nope, you just need to note that the domain of 31x^2+32x+12 is all real numbers because there is no number that we cant plug

zzr0ck3r · Answer

domain problems arise when you have a chance to either divide by 0, take square root of negative number, or take log of a negative number.

yanasidlinskiy · Answer

Makes more sense even after you explained it:D

yanasidlinskiy · Answer

Thanx again:D

zzr0ck3r · Answer

fo she z

yanasidlinskiy · Answer

What is that supposed to mean? Lol.

zzr0ck3r · Answer

for sure

yanasidlinskiy · Answer

Oh...Ok. Looked like somethin else I couldn't read:DxD!!!:D Lol.