Question

calcul prescurtat cu radicali clasa a 8 a ​

Answer 1

1)$(a+b)^{2}$=$a^{2}$+2*a*b+$b^{2}$

2)$(a-b)^{2}$=$a^{2}$-2*a*b+$b^{2}$

3)(a-b)(a+b)=$a^{2} -b^{2}$

La radicali este exact la fel.