Find the real zeros, if any, of each quadratic function using the quadratic formula. List the x-intercepts, if any, of the
graph of the function.
-$$f ( x ) = 5 x ^ { 2 } - 28 x - 12$$
A) $x = - \frac { 2 } { 5 } , x = 6$
B) $x = - \frac { 4 } { 5 } , x = 12$
C) $x = - 2 , x = 6$
D) $x = \frac { 2 } { 5 } , x = - 6$

Question

Quizplus · Accepted Answer

Using the quadratic formula, $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$, with $a = 5$, $b = -28$, and $c = -12$, we find the real zeros to be $x = - \frac { 2 } { 5 }$ and $x = 6$, which are also the x-intercepts of the graph.

Find the Real Zeros, If Any, of Each Quadratic Function f(x)=5x2−28x−12f ( x ) = 5 x ^ { 2 } - 28 x - 12f(x)=5x2−28x−12

Find the Real Zeros, If Any, of Each Quadratic Function $f ( x ) = 5 x ^ { 2 } - 28 x - 12$