√ (a+b)^3 formula expansion 130628-How to expand a^3-b^3
=SUM(*$E$29,C3*$E$30,D3*$E$31) by the way you can have the short cut by clicking the E29 in the formula bar and press F4 on your keyboard it will result like above formula The meaning of the $ dollar sign in the cell address is to make it fix and constant(abcde) 3 a 3 b 3 c 3 d 3 e 3 As usual, the cubics have a coefficient 1 There are 5 different letters, so we have 5 cubics The sum of the coefficients is 1·5=5 3a²b3a²c3a²d3a²e 3b²a3b²c3b²d3b²e 3c²a3c²b3c²d3a²e 3d²a3d²b3d²c3d²e 3e²a3e²b3e²c3e²d= 3*2*1 = 6, 2! Expand Using Identity 2x 3y 3 How to expand a^3-b^3