multiply, assume that all variables represent positive real numbers (square root

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(sqrtx+3)(sqrtx-3)

Jul 25th, 2015

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(sqrtx+3)(sqrtx-3)

(√x + 3)(√x - 3)

= √x* √x + 3 √x - 3 √x  - 3*3

= x + 3 √x - 3 √x  - 9

= x - 9 ...................................answer


answer is   x-9

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Jul 25th, 2015

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