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2014-05-18T21:19:07+03:00
A)E=(x+3)(x+3)+2(x-4)(x+3)+(x-4)(x-4)
E=x*x+6x+9+2(x*x+3x-4x-12)+x*x-8x+16
E=2x*x-2x+25+2x*x+6x-8x-24
E=4x*x-4x+1 <=> (2x-1)(2x-1)

b)E=1=>(2*1-1)(2*1-1)=1

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