Question

como se resuelve 5x(3x+20)= x(2x+3)?

Answer 1

5x(3x+20)= x(2x+3)

15x^2+100x=2x^2+3x

15x^2-2x^2=-100x+3x

13x^2=-97x

Answer 2

5x(3x+20)= x(2x+3)

15(x)^2 +100x = 2(x)^2 +3x

15(x)^2 +100x -2(x)^2 -3x = 0

13(x)^2 +97x = 0 

(x)^2 +(97/13)x =0 

(x)^2 +(97/13)x +(97/26)^2 = (97/26)^2 

(x +(97/26))^2 = (97/26)^2

x+ (97/26) = (97/26)                      x+ (97/26) = -(97/26)
x = (97/26) - (97/26)                      x= -(97/26) -(97/26)
x= 0                                               x= -194/26 = -97/13