Use the quadratic formula to
-$$2 x ^ { 2 } - 16 x + 30 = 0$$
A) 3, 5
B) 0, 3, 5
C) -3, -5
D) 2, 3, 5

Question

Quizplus · Accepted Answer

The quadratic formula is $$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$ for a quadratic equation $ax^2 + bx + c = 0$. Here, $a = 2$, $b = -16$, and $c = 30$. Plugging these values in gives $$x = \frac{16 \pm \sqrt{(-16)^2 - 4(2)(30)}}{2(2)} = \frac{16 \pm \sqrt{256 - 240}}{4} = \frac{16 \pm \sqrt{16}}{4} = \frac{16 \pm 4}{4}$$, which results in $x = 5$ or $x = 3$.

Use the Quadratic Formula to - 2x2−16x+30=02 x ^ { 2 } - 16 x + 30 = 02x2−16x+30=0

Use the Quadratic Formula to
- $2 x ^ { 2 } - 16 x + 30 = 0$