Find the real zeros of f. (Enter your answers as a comma-separated list.)

Question

f(x) = −x2 + 7x + 8x

X =_____

Find the x-intercepts of the graph of f.
(x, y) =_______(smaller x-value)
(x, y) =_______(larger x-value)

Answer 1

You want f(x) to be zero, so

-x^2 + 7x + 8x = 0

I suspect a type, why would you not just add 7x and 8x ?

waiting for your correction.....

Answer 2

jhhi