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Автор - jctjffghh

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Ответ

Автор - zinaidazina

a)  -x²+9x-8 = -x²+x+8x-8 = (-x²+x)+(8x-8) = -x(x-1) + 8(x-1) =

= (x-1)(-x+8) =(x-1)(8-x)

б) frac{1}{3}x^{2}+x-6=frac{1}{9}(3x^{2}+9x-54)=frac{1}{9}(3x^{2}+18x-9x-54)=

=frac{1}{9}((3x^{2}-9x)+(18x-54))=frac{1}{9}(3x(x-3)+18(x-3))=frac{1}{9}(x-3)(3x+18)=

=frac{1}{9}*3(x-3)(x+6)=frac{1}{3}(x-3)(x+6)

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