Question

Descompune in factor comun $8 x^{2} - ( \sqrt{2}x + 1)^{2}$ si $(x+ \sqrt{7}) ^{2} - (2x+2 \sqrt{7}) x^{2}$ .

Answer 1

a)=8x²-2x²-2√2x-1=6x²-2√2x-1

b)=x²+2√7x+7-2x³-2√7x²=
=-2x³+x²(1+2√7)+2√7x+7

Answer 2

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