Question #0312e

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Answer 1 · 2018-01-20T03:10:51

#(3+-sqrt(509))/10#

#5x^2-3x=25#

#=>x^2-3/5x=5#

#=>x^2-2(3/10)(x)+(3/10)^2-(3/10)^2=5#

#=>(x-3/10)^2=5+9/100=#

#=>(x-3/10)^2=509/100#

#=>x-3/10=+-sqrt(509)/10#

#=>x=3/10+-sqrt(509)/10=(3+-sqrt(509))/10#