Pismeni zadaci

Zadatak 0764

Test: MPo7BGII_154

Uprosti izraze:

a) \(2x(x-2)-x(2x+1)\);

b) \(3x^2-(3x-2)(x+2)\).

Rešenje:

a) \(2x(x-2)-x(2x+1)\);

$$2x(x-2)-x(2x+1)$$

$$=2x^2-4x-2x^2-x$$

$$=-3x$$

b) \(3x^2-(3x-2)(x+2)\)

$$3x^2-(3x-2)(x+2)$$

$$=3x^2-(3x^2+6x-2x-4)$$

$$=3x^2-3x^2-6x+2x+4$$

$$=-4x+4$$

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