Mathematic Problems

Mathematic Problems

Matematika - Képlettár

126. példa

MathReference: Zbirka zadataka - 126. )

(3 - 4 i) (3 + 4 i)

= 3^{2} - {(4 i)}^{2}

= 9 - 4^{2} \cdot {(i)}^{2}

= 9 - 16 \cdot (- 1)

= 9 + 16

= 25

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