August 2018 1 11 Report
1. Reducir: (x+4)(x–2)+(x–6)(x+4)–2x2
2. Reducir: (x+3)(x+2)–(x+7)(x+2)+(x+9)(x–4)–(x+4)(x+1)
3.Calcular: A+B
A= \sqrt (x+5)^{2} -( x+2)(x+8)
B=  \sqrt (x+6)^{2} -( x+3)(x+9)
4.  \frac{(x+6)( x^{2}-6x+36)+(x-6)( x^{2} +6x+36) }{6} ; x \neq 0
5.Si: a+b=6
ab=2
Calcular:  a^{3} +b^{3}

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