Решите 1 номер пожалуйста!!!!

Question

Решите 1 номер пожалуйста!!!!

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Answer 1

1) (4m-n)(4m+n)-(4m-n-4)^2=16m²-n²-16m²+8mn-n²+32m-8n-16=
=-2n²+8mn+32m-8n-16
2)(x+1)^3-(x-4)(x^2+4x+16)=x³+3x²+3x+1-x³+64=3x²+3x+65

Answer 2

1)(4m-n)(4m+n)-(4m-n-4)^2=16m^2-n^2-(4m-n-4)(4m-n-4)=16m^2-n^2-(16m^2-4mn-16m-4mn+n^2+4n-16m+4n+16)=16m^2-n^2-16m^2+4mn+16m+4mn-n^2-4n+16m-4n-16=8mn-2n^2+32m-8n-16;
2)(x+1)^3-(x-4)(x^2+4x+16)=x^3+3x+3x^2+1-(x^3-64)=x^3+3x+3x^2+1-x^3+64=3x^2+3x+65;