Photos X2 7X 0 ДИСКРИМИНАНТ

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X2 7x 0 дискриминант. X2+7x+2=0. (X+2)(X-7). X2=7. X(2x+3)(2-x)=0.
X2+7x+2=0. (X+2)(X-7). X2=7. X(2x+3)(2-x)=0.

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