We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
413
1
avatar

Noelle used the quadratic formula to solve x^2+10x+16=0. Delilah solved it without the quadratic formula. What did Delilah notice that enabled her to solve this equation without using the quadratic formula?

 Aug 12, 2017

Best Answer 

 #1
avatar+27849 
+1

Delilah noticed that 16 could be expressed as 2*8 and that 10 could be expressed as 2 + 8.

 

Therefore, the equation can be written as (x + 2)(x + 8) = 0

 

Hence x = -2 and x = -8

.

 Aug 12, 2017
 #1
avatar+27849 
+1
Best Answer

Delilah noticed that 16 could be expressed as 2*8 and that 10 could be expressed as 2 + 8.

 

Therefore, the equation can be written as (x + 2)(x + 8) = 0

 

Hence x = -2 and x = -8

.

Alan Aug 12, 2017

8 Online Users

avatar
avatar
avatar