1.uprość wyrazenie (x-4)(x+4)-(2x+1){2}+(x-5){2}.... Question from @natalia3410

October 2018 2 15 Report

1.uprość wyrazenie (x-4)(x+4)-(2x+1){2}+(x-5){2}

bea37

(x-4)(x+4)-(2x+1)²+(x-5)²=

=x²-16-4x²-4x-1+x²-10x+25=-2x²+8-14x

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Marmolady

$(x-4)(x+4)-(2x+1)^{2}+(x-5)^{2}=\\ x^2-4^2-(4x^2+4x+1)+x^2-10x+25=\\ x^2-16-4x^2-4x-1+x^2-10x+25=\\ -2x^2-14x+8$

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