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x²-3x+2.25 = 0
x = {-[3]+-√(-3² - 4*1*2.25)} / 2*1
x ={3 +- √(9 - 9)} / 2
x = (3+-0) / 2
x = 3/2
Saludos........
Es un trinomio cuadrado perfecto
(x-3/2)(x-3/2)=0
x-3/2=0 x-3/2=0
x1= 3/2 x2= 3/2