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LuckyWell [14K]
4 years ago
8

What are the exact solutions of x2 = 4 − 7x? (1 point) x = x equals negative 7 plus or minus the square root of thirty-three all

over 2 x = x equals negative 7 plus or minus the square root of sixty-five all over 2 x = x equals 7 plus or minus the square root of sixty-five all over 2 x = x equals 7 plus or minus the square root of thirty-three all over 2?
Mathematics
2 answers:
Law Incorporation [45]4 years ago
8 0
For this case, the first thing we must do is rewrite the polynomial:
 x ^ 2 + 7x - 4 = 0
 We use the resolver to solve the problem:
 x = (- b +/- root (b ^ 2 - 4 * a * c)) / (2 * a)
 Where,
 a = 1
 b = 7
 c = -4
 Substituting the values:
 x = (- 7 +/- root ((7) ^ 2 - 4 * (1) * (- 4))) / (2 * (1))
 x = (- 7 +/- root (49 + 16)) / (2 * (1))
 x = (- 7 +/- root (65)) / (2)
 Answer:
 
x equals negative 7 plus or minus the square root of sixty-five all over 2
Strike441 [17]4 years ago
7 0

Substituting the values:

x = (- (-7) +/- root ((7) ^ 2 - 4 * (1) * (- 4))) / (2 * (1))

x = ( 7 +/- root (49 + 16)) / (2 * (1))

x = ( 7 +/- root (65)) / (2)

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Mashutka [201]

Answer:

(80, 120)

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3 years ago
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maks197457 [2]

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3 years ago
Read 2 more answers
What is the value of x? Enter your answer in the box.
Mademuasel [1]

Answer:

x=55

Step-by-step explanation:

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