Anyone who helps will get +repped. This college algebra quiz is due in an hour and I need to verify one of the problems. Here it is: Compute and simplify the difference quotient. [f(x+h)-f(x)] / h. f(x) = 6x^2+9x My answer was 6h^2 + 9h + 18x. If this is right, just let me know, but I'm not too sure it is, so if it isn't please tell me how you got what you did. Help a stoner out! I'll positive rep anyone who gives it a shot.
Yeah Buffet that's the right answer. Here's the work: 6(x+h)^2+9(x+h)-(6x^2+9x)/h 6(x^2+2xh+h^2)+9x+9h-6x^2-9x/h 12xh+6h^2+9h/h 6h+12x+9 I love math.
nice lil problem, startin to get near some calc type stuff.. heres how i did it: (6(x+h)^2 + 9(x+h) - 6x^2 +9x) / h expanding (x+h)^2 and multiplying by 6: (6x^2 + 12xh + 6h^2 + 9x +9h - (6x^2 +9x)) / h (12xh +6h^2 +9x +9h - 9x) / h (12xh +6h^2 + 9h) / h 12x + 6h + 9