<span>-(3y-5c)+2(y+c)=-3y+5c+2y+2c=7c-y
<span>4a+3c-3a-4c=a-c
</span><span>3(3k-c)-(3c-k)=9k-3c-3c+k=10k
</span><span>4(y-a)-5(2a-y)=4y-4a-10a+5y=9y-14a
</span><span>2a-y-3a+2y=y-a
</span><span>4(a-x)-2(3a-x)=4a-4x-6a+2x=-2a-2x
</span>-(3a-c)+3(3c-a)=-3a+c+9c-3a=10c-6a
</span>
Ответ:
A= 6x-3 B=2x+4
A*B= (6x-3)(2x+4)=(12x^2)+24x-6x-12= (12x^2)+18x-12
M=2x N=5x
M*N=2x*5x=10x^2
x=2
(A*B)-(M*N)= ((12x^2)+18x-12)-(10x^2))=((12*2^2)+18*2-12)-(10*2^2))=48+36-12-40=72-40=32