College Algebra
Given the two functions fff and ggg, find fgfgfg and identify the domain.
f(x)=71x−2f\left(x\right)=71x-2f(x)=71x−2, g(x)=x+10g\left(x\right)=x+10g(x)=x+10
fg(x)=71x2+712x−20fg\left(x\right)=71x^2+712x-20fg(x)=71x2+712x−20; Domain: (−∞,∞)\left(-\infty,\infty\right)(−∞,∞)
fg(x)=71x2−712x−20fg\left(x\right)=71x^2-712x-20fg(x)=71x2−712x−20; Domain: (−∞,0)\left(-\infty,0\right)(−∞,0)
fg(x)=71x2+708x−20fg\left(x\right)=71x^2+708x-20fg(x)=71x2+708x−20; Domain: (−∞,∞)\left(-\infty,\infty\right)(−∞,∞)
fg(x)=71x2−708x−20fg\left(x\right)=71x^2-708x-20fg(x)=71x2−708x−20; Domain: (−∞,∞)\left(-\infty,\infty\right)(−∞,∞)