Explicación paso a paso:
(x+3)^2-5x=x^2+15
x^2+2(x)(3)+(3)^2=x^2+15
x^2+6x+9=x^2+15
6x+9=15
6x=15-9
6x=6
x=6/6
x=1
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Explicación paso a paso:
(x+3)^2-5x=x^2+15
x^2+2(x)(3)+(3)^2=x^2+15
x^2+6x+9=x^2+15
6x+9=15
6x=15-9
6x=6
x=6/6
x=1