7)8a^3+(a-b)^3 5)(a-b)^3+b^3

Question

7)8a^3+(a-b)^3
5)(a-b)^3+b^3

Answer 1

7)8а³+а³-3а²в+3ав²-в³=9а³-3а²в+3ав²-в³
5)=а³-3а²в+3ав²-в³+в³=а³-3а²в+3ав²