Question

Find the zeros of f.

f(x) = 2x2 + x − 21
x = ____ (smaller value)
x = ____ (larger value)

Answer 1

At 8:19 I posted this

http://www.jiskha.com/display.cgi?id=1413243942
and showed you how to show exponents.

You clearly did not even look at your previous post
This question is the same type.