Question

) 3(a+b) – 2ab;
) За + b – 2ab;
3) 3(a – b) + 2ab;
4) За – b+ 2ab
при а= 1,2, b = 1,8.пж​

Answer 1

1) 3(1,2+1,8)-2*1,2*1.8=3*3-4.32=9-4.32=4.68