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a) Find the product (1/2x2+y2) x-y
b) Simplyfy 5/3a2b x (-3/4ab3) x (-4/5a2b2) and find the value for 2= -2 and b= 1.
c) Divide x (5x2 - 80 by 5x (x+4).

Thanks in anticipation.

  • Math -

    c) I will do the last one,
    I assume you meant:
    x(5x^2 - 80)/(5x(x+4))
    = 5x(x^2 - 16)/(5x(x-4))
    = (x-4)(x+4)/(x-4)
    = x+4 , x ≠0, 4

    without proper bracketing, I cannot make out the others. Use ^ to show exponents

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