I am having a hard time solving my problem
2�ã20 + 5 �ã 80 - 7 �ã5
Can someone please help me
Is your �ã symbol supposed to represent the square root of what follows?
If so, use the fact that
sqrt 20 = 2 sqrt 5, and
sqrt 80 = 4 sqrt 5.
Then collect terms. All will contain a sqrt 5 factor.