EVALUATE THE FOLLOWING?

Evaluate 25/√40-√80 , given that √5 = 2.236 and √10 = 3.162

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2 Answers

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  • 8 years ago
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    First simplify: √40 = √(10 * 4) = 2√10

    (I square rooted the 4 inside the √ which gives 2 in front of the √)

    Therefore, 2 * 3.162 = 6.324 (the value of 2 * √10)

    Again, √80= √(16 * 5) = 4√5 (by square rooting 16)

    Therefore, 4 * 2.236 = 8.944

    (25/6.324) -8.944 = -4.991

    Sorry missed the divide sign earlier!

  • 8 years ago

    √40 = 2 √10 = 2*3.162 = 6.324

    √80 = 4 √5 = 4*2.236 = 8.944

    if its ..

    25/(√40-√80) ...then ans is 25 / -2.62 = -9.543

    or

    if its..

    25/√40 - √80 ...then ans is 3.95 - 8.944 = - 4.991 !!

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