Toán 8 - hàng đẳng thức : thực hiện phép tính:
a. (x+1)(x^2-x+1)-(x-1)(x^2+x+1)
b. (x^2+2x+1)^2+(2x+1)^2-2(x^2+2x+1)(2 x+1)
c. -3x(x^2)^2+(x+3)(x-1)(x+1)-(2x-3)^2
d. (2x-3)^3+(4-2x)(16+8x+4x^2)+(4x+3)( 9x+1)
giúp em với đang cần gấp ạ

costs the what? what is the cost of the pants?

step-by-step explanation:

if it is $10, then the price is 14.

take 40% of the cost, and then add the cost.

40% of 10 = 4

4+10 = 14.

step-by-step explanation:

what does 'mandy have ben 780 bottle caps. ' mean?

b. 18

step-by-step explanation:

so the equation for this is:

ab^2=ac⋅ad

ab being the top length of 6 and ac being the length of 2 and ad being the length of x. let's plug into the equation:

6^2 = 2x

now lets just solve for x:

36 = 2x

18 = x

i hope that !