How do I solve this question?

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asked Jul 16, 2018 21.7k views

1 Answer

Tchelidze · Answer 1 · 2018-07-21T01:43:09+0000

this is a perfect square trnomial
(a+b)²=a²+2ab+b²
we see that a=5x and b=2

(5x)²+2(5x)(2)+2²=0
factor
(5x+2)²=0
set equal to zero
5x+2=0
5x=-2
x=-2/5

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