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ddd [48]
3 years ago
7

Which are the solutions of x2 = –5x + 8?

Mathematics
2 answers:
Zielflug [23.3K]3 years ago
6 0

Answer:

The solutions are 1.275 and -6.275

Step-by-step explanation:

Given

x^2 = –5x + 8

First, put all terms in the left side of the equal sign, as follows:

x^2 + 5x - 8 = 0

Then, use the quadratic formula with a = 1 (the coefficient of the quadratic term), b = 5 (the coefficient of the linear term) and c = -8 (the independent term).

x = \frac{-b \pm \sqrt{b^2 - 4(a)(c)}}{2(a)}

x = \frac{-5 \pm \sqrt{5^2 - 4(1)(-8)}}{2(1)}

x = \frac{-5 \pm \sqrt{57}}{2}

x_1 = \frac{-5 + \sqrt{57}}{2}

x_1 = \frac{-5 + 7.55}{2}

x_1 = 1.275

x_2 = \frac{-5 - \sqrt{57}}{2}

x_2 = \frac{-5 - 7.55}{2}

x_2 = -6.275


antoniya [11.8K]3 years ago
4 0
The answer is A
hope this helps
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