Question

help me correct my answers. tell me if i am wrong or right! WILL GIVE BEST RESPONSE if you help correctly :)

Answer 1

for the first, it is distributive property so
5x(x^4 - 3x^3 + 2x - 4) =
(5x)(x^4) + (5x)(-3x^3) + (5x)(2x) + (5x)(-4)
5x^5 - 15x^4 + 10x^2 - 20x

Answer 2

the second is correct :)

Answer 3

if you understand foil
(which is just an extended version of distributive property)
then for the third
(x^2 - 2) (x +3) =
(x^2)(x) + (x^2)(3) + (-2)(x) + (-2)(3)
x^3 + 3x^2 - 2x - 6

Answer 4

for the fourth...
like how x^2 = x*x
(x - 4)^2 = (x - 4)(x - 4)
which you would foil

Answer 5

not really...
try foiling it...

Answer 6

(x - 4)(x - 4) =
(x)(x) + (x)(-4) + (-4)(x) + (-4)(-4)
x^2 - 4x - 4x + 16
x^2 - 8x + 16
so it would be D

Answer 7

your welcome :)

Answer 8

(x+4)(-3x^2 - 4x + 2) distributive...
(x)(-3x^2)+(x)(-4x)+(x)(2) + (4)(-3x^2)+(4)(-4x)+(4)(2)