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7 March, 04:06

What is the value of the expression when a is 5 and b is 3 4a^2-5b^2

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  1. 7 March, 06:42
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    So that gives you

    4*5^2-5*3^2

    First you have to do the exponents

    5^2=25

    3^2=9

    Now you have 4*25-5*9

    4*25=100

    5*9=45

    100-45=55

    55 is the answer.
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