October 2018 1 116 Report
Resuelve las ecuaciones cuadraticas por ley general de factorizacion.

a. x(3x+3)=5x+3
b. x(3x-2)=(x+4)(4-x)
c. 9x+1=3(x^2-5)-(x-3)(x+2)
d. (2x-3)^2 –(x+5)^2=-23
c. 25(x+2)^2-(x+7)^2-81

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