Question

expand [1/3a - 1/2b +1] ^2 step by step ​

Answer 1

Answer:

a²/9 + b²/4 + 1 -ab/3 - b + 2a/3

Step-by-step explanation:

[1/3a - 1/2b +1]²                   {(a+b+c)²=a²+b²+c²+2ab+2bc+2ac)}

=(1/3a)² + (-1/2b)² + (1)² + 2(1/3a)(-1/2b) + 2(-1/2b)(1) + 2(1/3a)(1)    (Negative square is positive)

=a²/9 + b²/4 + 1 -ab/3 - b + 2a/3

Hope this helps