Posted by Linda on Thursday, November 3, 2011 at 2:25am.
Solve the equation
40^2 + 4a = 0
What I did was 4a (10a + 1) = 0 then I'm not sure what to do next...

Math  Anonymous, Thursday, November 3, 2011 at 4:17am
40 ^ 2 + 4a = 0
1600 + 4a = 0
4a =  1600 Divide both sides with 4
a =  1600 / 4
a = 400

Math  Reiny, Thursday, November 3, 2011 at 9:28am
According to what you show in your solution, your equation was probably
40a^2 + 4a = 0
then
4a(10a + 1) = 0
so 4a = 0 or 10a+1 = 0
a = 0 or a = 1/10
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