Question

Simplify: 15b^2(2-3a)+5a(5+4b),at a=0'b=-1

Answer 1

15b² (2-3a) + 5a(5+4b)

where a = 0 and b = -1

15(-1)²[2-3(0)] + 5(0)[5 + 4(-1)]

15[2] + 0

=> 30

Answer 2

Answer:

15b^2(2-3a)+5a(5+4b)

a=0,b=-1

30b² - 45ab² + 25a +  20ab

30(-1)² - 45*0(-1)² + 25*0 + 20*0*-1

30 - 0

30