jawab yang nomor 12 sama 13 dongg besok dikumpul

[tex]12)25 {}^{2} - (25 - 10) {}^{2} \\ = 625 - 15 {}^{2} \\ = 625 - 225 \\ = 400 \\ 13)n \times n = 961 \\ n = \sqrt{961} \\ n= 31[/tex]

12.D.400
25² - ( 25 - 10 )²
= 625 - 15²
= 625 - 225
= 400


13.C.31
n x n = 961
√961 = n
Maka n = 31
Karena 31 x 31 = 961


semoga membantu..