Question

Efectuar: E=(x 5)(x 4) - (x 10)(x 2)y evaluar para: x=1/21

Answer 1

Aqui esta
E = x^2 + 4x + 5x + 20 - (x^2 + 2x + 10x + 20) E= x^2 + 9x +20 -x^2 -11x -20 E= -2x para x = 1/21... E = -2 · 1/21 E = -2/21
ojala te sirva ............