Posted by **Ms.Ellis** on Thursday, July 21, 2011 at 2:49pm.

Help Please:

Please Help

1.Essay:Show all work,Find the Product.

(x^2-2)(x^3-4x+9)

2.Find the product:(2x-4y)(2x+4y)

4.Find the product:(8x-3y)^2

a.64x^2+9y^2

b.64x^2-9y^2

c.64x^2-48xy+9y^2

d.64x^2-48xy-9y^2 (b)

- Math -
**Priya**, Thursday, July 21, 2011 at 3:19pm
(x^2 -2)(x^3 - 4x + 9)

(x^2) (x^3) = x^5

(x^2) (-4x) = -4x^3

(x^2) (9) = 9x^2

(-2) (x^3) = -2x^3

(-2) (-4x) = 8x

(-2) (9) = 18

Now, we add the right-hand sides of the equeal sign.

x^5 - 4x^3 - 2x^3 + 9x^2 + 8x - 18

x^5 - 6x^3 + 9x^2 + 8x - 18

There I did the 1st one for u. Try and do the rest.

- Math -
**Mithra**, Thursday, July 21, 2011 at 3:29pm
(2x-4y)(2x+4y)

4x^2 + 8xy - 8xy - 16y^2

4x^2 - 16y2

- Math -
**Mithra**, Thursday, July 21, 2011 at 3:32pm
(8x-3y)^2

(8x - 3y) (8x - 3y)

Try finish it from there...

- Math -
**Ms.Ellis**, Thursday, July 21, 2011 at 9:47pm
Thanks Priya and Mithra I appreciate your help.

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