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How is score calculated in this website?

 

What is the value of x in this equation?

 

\(-5x^2 + 25x + 3 = 3x^2 + 14x - 42\)

 Jan 9, 2024
edited by DS2011  Jan 9, 2024
 #1
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Simplify as

 

8x^2 - 11x - 45 =  0 

 

Quadratic Formula

 

x =  [ 11 ±  sqrt  [ 11^2  - 4 (8) (-45) ] ] /  [2 * 8 ]  = 

 

[ 11 ±  sqrt [  121 + 1440 ] ]  / [16 ]  =

 

[ 11± sqrt  [ 1561 ] ]  /  16  

 

 

cool cool cool

 Jan 9, 2024

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