Question

I need help with this question ​

Answer 1

2ab(7a^4b^2+ a^5×b-2a)

start with multiple 2ab into the equation

(2ab×7a^4b^2)+(2ab×a^5×b)-(2ab×2a)

((2×7)a^(4+1)b^(2+1))+(2×a^(5+1)×b^(1+1))-((2×2)a^(1+1)×b)

14×a^5×b^3+2×a^6×b^2-4×a^2×b