2a(a + b) – b(2a– b) – b(b + 1) при а = - 0,3 и b = - 0,4.

Question

2a(a + b) – b(2a– b) – b(b + 1) при а = - 0,3 и b = - 0,4.

Answer 1

2a^2+2ab-2ab+b^2-b^2-b=2a^2-b 2×(-0,3^2)-(-0,4)=0,58