Math School

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- & Chapter 3.1, Lecture-16

‌‌১২) x=3, y=4 এবং z=5 হলে, 9x^2+16y^2+4z^2-24xy-16yz+12xz= কত?

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Class- Nine & Ten General Math Chapter 3.1, Lecture- 15

‌‌১১) a+b+c=6 এবং a^2+b^2+c^2=14 হলে, (a-b)^2+(b-c)^2+(c-a)^2= কত ?

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Class- Nine & Ten General Math Chapter 3.1, Lecture- 12

‌‌৮) a+b=√7 এবং a-b=√5 হলে, প্রমাণ কর যে, 8ab(a^2+b^2)=24

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Class- Nine & Ten General Math Chapter 3.1, Lecture- 11

‌‌৭) a+1/a=2 হলে, দেখাও যে, a^2+1/a^2=a^4+1/a^4