How do you go and answer this, need help please... Given f(x) = xsquared g(x) = 2x + 3 Solve fg(x) = f(x)
Follow Math Help Forum on Facebook and Google+
f(g(x))=(2x+3)^2=x^2=f(x) 4x^2+12x+9=x^2 3x^2+12x+9=0 x^2+4x+3=0 . . .
Thanks I understand up to 3x^2+12x+9=0 but don't understand why you wrote x^2+4x+3=0 afterwards?
Originally Posted by Natasha1 Thanks I understand up to 3x^2+12x+9=0 but don't understand why you wrote x^2+4x+3=0 afterwards? I divided all by 3...
Oh yes of course thanks!
View Tag Cloud