Question

(x+4)(4-x) + ( " raiz de x " +1 )( " raiz de x " -1 ) ( x +1 )

Answer 1

Respuesta: 15 + 2x²

Explicación:

$(x+4)(4-x)+(\sqrt{x} +1)(\sqrt{x} -1)(x+1)\\(4)^{2} -(x)^{2} +(\sqrt{x} )^{2} -(1)^{2} (x+1)\\16-x^{2} +(x-1)(x+1)\\16-x^{2} +x^{2} -1\\15$