+0  
 
+1
37
1
avatar+30 

1.If x^2-7x+c=(x+a)^2 for some constants a and c then find a

 

2.if x^2-7x+c=(x+a)^2 for some constants a and c find c 

 Jan 25, 2019
 #1
avatar+96207 
+1

1.If x^2-7x+c=(x+a)^2 for some constants a and c then find a

 

x^2 - 7x + c  =  x^2 + 2ax + a^2

 

So....equating coefficients

 

2a = -7        and 

 

c = a^2

 

So.....

 

a = (-7/2)       and c = a^2  =  (-7/2)^2 =  49/4  

 

 

cool cool cool

 Jan 25, 2019

25 Online Users

avatar
avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.