Math

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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 -

    (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 -

    (2x-4y)(2x+4y)

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

    4x^2 - 16y2

  • Math -

    (8x-3y)^2

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

    Try finish it from there...

  • Math -

    Thanks Priya and Mithra I appreciate your help.

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