Is it possible to make a triangle with two obtuse angles

No it wouldn’t be possible because the sum of the 3 angles of a triangle equals 180 (A+B+C= 180). If two angles (A and B) are greater than 90, then their sum would be greater than 180. (A+B= 180 +) where DELTA ( or the triangle) is some arbitrarily small positive amount.
Then substituting into eq. 1
A+B+C= 180
180++C = 180
+C= 0
C= -
This shows that the remaining angle (C) would need to be negative to make the sum equal 180.
That's not possible, therefore two obtuse angles would not be allowed in a triangle.

(m+11n)^2=(m+11n)(m+11n)=m^2+11mn+11mn+121n^2=m^2+22mn×121n^2 for example; use foil: (a+b)(a+b)first. a^2outside. abinside. ablast. b^2