Question

Find all of the zeros of f(x) = 5x2 + 40x - 100.

Answer 1

Answer:

$x_1 = 2$

$x_2 = -10$

Step-by-step explanation:

To find all of the zeros of f(x) = 5x^2 + 40x - 100 we can use the quadratic formula:

$x = \frac{-40 \pm \sqrt{40^2 - 4(5)(-100)}}{2(5)}$

$x = \frac{-40 \pm 60}{10}$

$x_1 = \frac{-40 + 60}{10}$

$x_1 = 2$

$x_2 = \frac{-40 - 60}{10}$

$x_2 = -10$

Answer 2

I used the quadratic equation to solve so your answer is X= -10, 2