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I need help with this question

 Nov 20, 2018
 #1
avatar+95884 
+1

Using the Pythagorean Theorem, we have that

 

(x+ 5)^2 + ( x - 3)^9   = 9^2      simplify

 

x^2 + 10x + 25 + x^2 - 6x + 9  = 81

 

2x^2 + 4x - 47 = 0

 

Using the Quadratic Formula

 

 

x =     [ -4 ±√ [ 16 - 4 *2 * -47 ] } / 2*2

 

x = [ - 4 ±√392 ] / 4

 

Take the positve answer   and x  ≈ 3.95

 

 

 

cool cool cool

 Nov 20, 2018

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