15te-12he+10ty-8hy
Ans:
15te-12he+10ty-8hy
1. group or split the expression in pairs (15te-12he)+(10ty-8hy)
2. take out the common factor of each group 3e(5t-4h) + 2y(5t-4h)
3. If the quantities in the parenthesis are equal/identical, factor out again the common factor (5t-4h)(3e+2y)
To check use the FOIL METHOD.
