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PSYCHO15rus [73]
3 years ago
7

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

Mathematics
2 answers:
alexandr1967 [171]3 years ago
7 0

Answer: First option.


Step-by-step 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


Margarita [4]3 years ago
5 0

Answer:

answer is A x=2+/- squareroot of 42

Step-by-step explanation:


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