Question

. Find x and y such that xy = 72, X + y = 17.

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Answer 1

Answer:

given that

Xy = 72

x = 72/y

putting the value of x

x+y = 17

72\y+y = 17

72+y²/y = 17

72+y²=17y

y²-17y+72 = 0

y²-9y-8y+72 = 0

y(y-9)-8(y-9) = 0

(y-9)(y-8)= 0

when y-9 = 0 when y-8 = 0

y = 9. y = 8

putting the value of y in xy

xy = 72.

when y = 9. when y = 8

x×9 = 72. x×8 = 72

x = 72/9. x = 72/8

x = 8 x = 9

Step-by-step explanation:

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