Step-by-step explanation:
We have (x + y)² = (x + y)(x + y) = x² + 2xy + y².
Let x be 3a and y be 2.5b.
Therefore (3a + 2.5b)²
= (3a)² + 2(3a)(2.5b) + (2.5b)²
= 9a² + 15ab + 6.25b².
Hence the '*' sign should be replaced with 15ab.
Answer:Mmm
I am doing the work I will thell you the answer
Answer: hiiiiiii lol
Answer:
x=70
the angles opposite 3.5 equal 55 degrees
180-55-55=70
