ответ
a)(3b-2) (5-2b)+6b2
15b-6b2-10+4b+6b2 19b-10
б)(7y-4)*(2y+3)-13y
14y2+0-12 14y2-12
b)x3 (x2-3x)(x+3)
×3+2x'(x+3) x3+2x2+6x
r)5b3+(a2+5b)*(ab-b2) 5b3+a3b-a2b2+5ab2-5b3 a3b-a2b2+5ab2
ответ
a)(3b-2) (5-2b)+6b2
15b-6b2-10+4b+6b2 19b-10
б)(7y-4)*(2y+3)-13y
14y2+0-12 14y2-12
b)x3 (x2-3x)(x+3)
×3+2x'(x+3) x3+2x2+6x
r)5b3+(a2+5b)*(ab-b2) 5b3+a3b-a2b2+5ab2-5b3 a3b-a2b2+5ab2