Answers

2016-04-14T10:13:24+05:30
Let collect common from this 4u(1+2) now,first zero is 4u=0 and 1+2=0 OK this is zeroes
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2016-04-14T11:58:38+05:30
4u+8u^{2}

8u^{2} + 4u

Let,

8u^{2} + 4u = 0

4u ( 2u + 1) = 0

u = 0 and u = -1/2
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