Question

ПОМОГИТЕ!!!!СРОЧНО!!!

Answer 1

Ответ:

1

a) $(3a+4)^{2} = 9a^{2} +24a + 16$

б)$(2x-b)^{2} = 4x^{2} -4xb + b^{2}$

в)$(b+3)(b-3) = b^{2} -9$

г)$(5y-2x)(5y+2x) = 25y^{2} -4x^{2}$

2

$(c+b)(c-b)-(5c^{2} -b^{2}) = c^{2} -b^{2} -5c^{2} +b^{2} = -4c^{2}$

3

a) $25y^{2} -a^{2} = (5y-a)(5y+a)$

b)$c^{2} +4bc+4b^{2} = (c+2b)^{2}$