Bentuk sederhana dari (3√2-5)(3√2+5) adaalh

[tex](3 \sqrt{2} - 5)(3 \sqrt{2} + 5) \\ = (3 \sqrt{2} \times 3 \sqrt{2} ) + (3 \sqrt{2} \times 5) + ( - 5 \times 3 \sqrt{2} ) + ( - 5 \times 5) \\ = 9 \sqrt{4} + 15 \sqrt{2} - 15 \sqrt{2} - 25 \\ = 9 \times 2 - 25 \\ = 18 - 25 \\ = - 7[/tex]