Question

очень надо, решите плиз

Answer 1

1.1)(5+2x)^2=25+20x+4x2
   2)(3a-2)(2+3a)=9a2-4
   3)(13y-14x)(13y+14x)=19y2-116x2
   4)y(2x-y)-(x-y)^2=2xy-y2-x2+2xy-y2=4xy-x2-2y2
2.1)25t2-z2=(5t-z)(5t+z)
   2)-64a3-16ab-a3=-65a3-16ab=-a(65a2-16b)
   3)64a3-27b3=(4a-3b)(16a2+12ab+9b2)
   4)az+bt-at-bz=z(a-b)-t(a-b)=(z-t)(a-b)
   5)x3-3x2+x-3=x2(x-3)+(x-3)=(x2+1)(x-3)
   6)36-(a+6)^2=36-a2-12a-36=-a2-12a=-a(a+12)