Question

(0,3-м)(м+0,3); (1/2а-2в)(1/3а+2в); (0,2а+0,5х)(0,2а-0,5х);

Answer 1

(0,3-m)(m+0,3)=0,09-m2
(0.2a + 0.5x)(0.2a-0.5x)=0.04a2 – 0.25a2