Help with how to do these equations on expanding etc

*this isn't my homework*

how to expand the following expressions?
a) (8 - d)^2
b) -5x(7 - 2x)
c) 3(x - 4) + 10

Hi,

a) (8 - d)² = (8 - d)(8 - d) =

8(8 - d) - d(8 - d) =

64 - 8d - 8d + d² =

d² - 16d + 64 <==ANSWER

b) -5x(7 - 2x) = -5x(7) - 5x(-2x) = -35x + 10x² <==ANSWER

c) 3(x - 4) + 10 = 3(x) + 3(-4) + 10 = 3x - 12 + 10 = 3x - 2 <==ANSWER

I hope that helps!! :-)

a) (8 - d)(8 - d) => 8*8 + d^2 - 8*d - 8*d = d^2 + 64 - 16d

b) -5x(7-2x) => -(5*7)*x + (2*5)* (x*x) = 10x^2 - 35x

c) 3(x - 4) + 10 => 3*x - (3*4) +10 = 3x - 12 + 10 = 3x - 2