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pychu [463]
3 years ago
7

Solve the quadratic equation.

Mathematics
1 answer:
andrew-mc [135]3 years ago
8 0
(x - 7)^2 = 81

x - 7 =  \pm \sqrt{81}

x - 7 =  \pm 9

x = 9 + 7 \ \ or \ x = -9 + 7

x = 16 \ \ or \ x = -2

----------------------------------------------------------
Answer: x = 16 or x = -2 ( Answer C)
----------------------------------------------------------
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inessss [21]

The solution of the equation is x = 71 / 36.

<h3>How to solve an equation with one variable</h3>

Herein we have an equation with several rational constants and only one variable, x, which has to be cleared by using algebra procedures. The procedure is shown below:

2 · x + 1 / 3 + x - 1 / 4 = 13 / 2           Given

2 · x + x = 13 / 2 - 1 / 3 - 1 / 4            Compatibility with addition / Existence of additive inverse / Modulative property

3 · x = 71 / 12                                    Definitions of addition and subtraction / Distributive property

x = 71 / 36                                         Compatibility with multiplication / Existence of multiplicative inverse / Modulative property / Result

The solution of the equation is x = 71 / 36.

To learn more on equations: brainly.com/question/10413253

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It either x=5 or x=-2 not sure which on 

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3 years ago
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