The distance between two points (2,5)and (x,-7)is 13 find the value of x
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5
Answer:
x=7 or x=-3
Step-by-step explanation:
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Answer:
The distance between two points (2,5)and (x,-7)is 13. The value of x is -3 or 7
Step-by-step explanation:
The distance between two pints is given by:
d = √{(x₁ - x₂)² + (y₁ - y₂)²}
Let's substitute the values as follows:
13 = √{(2 - x)² + (5 + 7)²}
Squaring both sides we get:
169 = x² - 4x + 4 + 144
collecting the like terms together we have:
169 - 148 = x²- 4x
21 = x² - 4x
This is a quadratic equation.
Rewriting this we get:
x² - 4x - 21 = 0
Expanding the equation we have:
x² + 3x - 7x - 21 = 0
x(x + 3) - 7(x + 3) = 0
(x - 7)(x + 3) = 0
x = 7 or -3
So, x can take the value 7 or -3
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