Question

упростите: а)8x-6y-11x-4y, б)2(5x-1)-(2-8x), в)(x+4)(x+8); г)(5c-7)(3c+1) помогите

Answer 1

8x-6y-11x-4y=(8x-11x)+(-6y-4y)=-3x+(-10y)
2(5x-1)-(2-8x)=10x-2-2+8x=(10x+8x)+(-2-2)=18x-4
(x+4)(x+8)= (x+x)(8+4)=2x×12=24x
(5c-7)(3c+1)=(5c+3c)(-7+1)=8c×(-6)=-48c