2ab-b+3ab² при a= 2,3 и b= -2,5

Question

2ab-b+3ab² при a= 2,3 и b= -2,5

Answer 1

= b(2a-1+3ab)=-2.5(4.6-1-3*2.5*2.3)=-2.5(3.6-17.25)=34.125

Answer 2

2ab-b+3ab²=b(2a-1+3ab)=-2.5(2*2.3-1+3*2.3*(-2.5))=-2.5*(4.6-1-17.25)=
=-2.5*(-13.65)=34.125