Maths-
General
Easy

Question

Use polynomial identities to factor the polynomials or simplify the expressions :
10 cubed minus 3 cubed

The correct answer is: Thus, the answer is 10^3 - 3^3 = 973


    ANSWER:
    Hint:
    open parentheses a cubed minus b cubed close parentheses equals left parenthesis a minus b right parenthesis open parentheses a squared plus a b plus b squared close parentheses, here a and b can be real values, variables or multiples of both.
    We are asked to use polynomial identities to factorize the given expression.
    Step 1 of 2:
    The given expression is 10 cubed minus 3 cubed text . It is of the form  end text open parentheses a cubed minus b cubed close parentheses text  where  end text a equals 10 straight & b equals 3 text .  end text
    Step 2 of 2:
    Use the polynomial identity to find the answer of the expression;
    table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row cell 10 cubed minus 3 cubed equals left parenthesis 10 minus 3 right parenthesis open parentheses 10 squared plus left parenthesis 10 right parenthesis left parenthesis 3 right parenthesis plus 3 cubed close parentheses end cell row cell equals 7 left parenthesis 100 plus 30 plus 9 right parenthesis space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space end cell row cell space equals 7 left parenthesis 139 right parenthesis space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space end cell row cell space equals 973 space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space end cell end table
    Thus, the answer is 10 cubed minus 3 cubed equals 973
    Note:
    Polynomial identities are equations that are true for all possible values of the variable. We can perform polynomial multiplication by applying the distributive property to the multiplication of polynomials.

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