Question

(2a-1)(4a+2a+1) при а=1/2

Answer 1

(2×1/2-1)×(4×1/2+2×1/2+1)=0.

1)2×1/2=1;

2)1-1=0;

3)4×1/2=2;

4)2×1/2=1;

5)1+1=2;

6)0×2=0.