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5 votes
5 votes
Could someone please help me?

Could someone please help me?-example-1
User Synoli
by
2.7k points

1 Answer

14 votes
14 votes

Answer:

Option B

Explanation:

Use the formula


x = \frac{-b\±\sqrt{b^(2)-4ac } }{2a}

now input the values. In equation
x^(2) - 5x + 7 = 0, a = 1, b = -5 & c = 7

By taking positive sign we get,


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


x = \frac{-(-5)+\sqrt{(-5)^(2)-4.1.7 } }{2.1}


x = (5+√(25-28 ) )/(2)


x = (5+√(-3 ) )/(2)

In the same way, by taking minus sign, we get
x = (5-√(-3 ) )/(2)

User Micah Pearce
by
3.6k points
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