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Math Help - answer all this questions ?

  1. #1
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    answer all this questions ?

    answer all this questions


    1) Eliminate in 11x^-2+(11x)^-2
    2)perform the indicated operation and simplify ..
    a)3(x^2+y^2) x (y+2x)+2y cx+3y
    b)-5c4x^2(2x+2)-2(x^2-5-2x)
    factor the expression
    a)5x^2+25x+30
    b)3x^2-3
    c)a^3+27
    b) bu^3 v^3+18u^2 v w^4 12 u^2 v^3

    3) simplify ( _3m^3_____)
    qn^6


    4)solve by using factoring

    1)z^2 -8z=0

    2) x^-4x+4=0

    3)x^3 - 100x=0

    5) find all real roots by using quadratic formula .

    1) p^2 - 7 p+3 =0

    2) 2 -2 x+x^2 =0

    3) 2x^2+4x=5

    6) a sales person needs to caulcuate the cost of an item with sale tax of 8.25% write an qvation that repersents the total cost c of an item costing x dollars

    7) express the indicated system in term of the remaing system .
    s= p (1+rt) j r (solve for r)
    s=p (1+rt) jt ( solve for t)
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  2. #2
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    Quote Originally Posted by coolforever View Post

    4)solve by using factoring

    1)z^2 -8z=0
    You must take out a common factor

    z^2 -8z=0

    z(z -8)=0

    Then by the null factor law

    z=0,8

    Have you done any work on these problems yet or did you just post them?
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