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Define $E(a,b,c) = a \cdot b^2 + c$. What value of $a$  is the solution to the equation 

$E(a,4,5) = E(a,6,7)$?

 Aug 14, 2020
 #1
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The solution is a = -3.

 Aug 14, 2020
 #3
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+2

 

Define E(a,b,c) = a . b^2 + c. What value of a is the solution to the equation 

E(a,4,5) = E(a,6,7)?

 

a*42 +  5 = a*62 + 7 

 

16a + 5 = 36a + 7

 

5 - 7 = 36a - 16a

 

20a = -2

 

a = -1/10  or a =- 0.1

 Aug 14, 2020
edited by Alan  Aug 14, 2020

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