x2+7x+10=7x+26
x2+7x+10-7x-26=0
x2-16=0
x2=16
x=raíz de 16
x=4.
comprobación
4(2)+7×4+10=7×4+26
16+28+10=28+26
54=54
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x2+7x+10=7x+26
x2+7x+10-7x-26=0
x2-16=0
x2=16
x=raíz de 16
x=4.
comprobación
4(2)+7×4+10=7×4+26
16+28+10=28+26
54=54