(а+12)²=а²+24а+144
а²+12а=а(а+12)
(8b+5c)(5c-8b)= 25c²-64b²
a²-25= (a-5)(a+5)
9a²-2ab+b²=(a-b)²+8a²
144b²-c²=(12b-c)(12b+c)
(-x-y)²= -x²-2xy-y²
(m+n)²=m²+2mn+n²
b²+9a²+6ab=(b+3a)²
(7+3y)(3y-7)=9y²-49
(1-4a)²=1-8a+16a²
(а+12)²=а²+24а+144
а²+12а=а(а+12)
(8b+5c)(5c-8b)= 25c²-64b²
a²-25= (a-5)(a+5)
9a²-2ab+b²=(a-b)²+8a²
144b²-c²=(12b-c)(12b+c)
(-x-y)²= -x²-2xy-y²
(m+n)²=m²+2mn+n²
b²+9a²+6ab=(b+3a)²
(7+3y)(3y-7)=9y²-49
(1-4a)²=1-8a+16a²