Question

Упростить a)(C+4)(c-3)-(c^2+5c) б)(X+4)x-(x-3)(x+7) в)a(2a-1)+(a+3)(a-5) г)(p+3c)c-(3c+p)(c-p)

Answer 1

A) c²+c-12-c²-5c=-12-4c=4(3+c)

b)x²+4x-x²-4x+21=21

c)2a²-a+a²-2a-15=3a²-3a-15 = 3(a²-a-5)

d)pc+3c²-3c²+2pc-p²=3pc=²

Answer 2

=-(12+4c)=-4(3+c) (a)
=21 (б)
=3а(а-1)-15 (в)
=p(3c+p) (г)