Asked by Valdes
Solve the equation (5y+1)^2 + 5(5y+1) + 6 = 0.
Do not expand first.
I solved the equation up to 25y^2 + 35y + 12 = 0 and not sure how to proceed from here on.
Do not expand first.
I solved the equation up to 25y^2 + 35y + 12 = 0 and not sure how to proceed from here on.
Answers
Answered by
Steve
Do not expand first.
So, let u = 5y+1.
I'm sure you can solve
u^2 + 5u + 6 = 0
(u+3)(u+2) = 0
u = -3 or -2
That means you now need to solve
5y+1 = -3
or
5y+1 = -2
No problem now, eh?
So, let u = 5y+1.
I'm sure you can solve
u^2 + 5u + 6 = 0
(u+3)(u+2) = 0
u = -3 or -2
That means you now need to solve
5y+1 = -3
or
5y+1 = -2
No problem now, eh?
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