Question

упростить

(b+3)^2
25b^2+10b+1
(2a-3b)(3b+2a)
b^2 - 4/9
1+b^3
(10-c)^2
81a^2-18ab+b^2

Answer 1

(b+3)^2=в^2+9+6в
25b^2+10b+1=(5в+1)^2
(2a-3b)(3b+2a)=4а^2-9в^2
b^2 - 4/9 =(в-2/3)(в+2/3)
1+b^3=1+3в+3в^2+в^3
(10-c)^2=100+с^2-200с
81a^2-18ab+b^2=(9а-в)