Question

(2a-3)'2'+(3-2a)(3+2a)-3(a+)(3a-1) Упростите пж

Answer 1

$(2a-3)^{2} +(3-2a)(3+2a)-3(a+2)(3a-1)= \\ =4a^{2} -12a+9+9- 4a^{2}-9a^{2}+3a-18a+6= \\ =-9a^{2}-27a+24$