Solve for x in the equation x² - 4x - 9 = 29.

Question

asked Feb 18, 2020 234k views

2 Answers

Rsethc · Answer 1 · 2020-02-23T05:39:38+0000

Answer: First option.

Explanation:

1. To solve this problem you can applly the quadratic formula, which is shown below:

$x=\frac{-b+/-\sqrt{b^(2)-4ac}}{2a}$

2. The quadratic equation is:

$x^(2)-4x-9-29=0\\x^(2)-4x-38=0$

3. Then:

a=1

b=-4

c=-38

4. Therefore, when you substitute these values into the quadratic formula, you obtain the following result:

$x=\frac{-(-4)+/-\sqrt{(-4)^(2)-4(1)(-38)}}{2(1)}$

x=2±√42