Question

substitution method:xy=14.....(1),x-y = -5......(2) plzz solve plzzz​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Y= 2, -7

Step-by-step explanation:

by substitution method..

$xy = 14....(1) \\ x + y = - 5.....(2) \\ from \: 1st \: equation \\ x = \frac{14}{y} \\ put \: in \: 2nd \: eqn. \\ = \frac{14}{y} + y = - 5 \\ = \frac{14 + {y}^{2} }{y} = - 5 \\ = 14 + {y}^{2} = - 5y \\ = {y}^{2} + 5y + 14 = 0 \\ = {y}^{2} + 7y - 2y + 14 = 0 \\ = y(y + 7) - 2(y + 7) = 0 \\ = (y - 2)(y + 7) = 0 \\ y = 2 \: \: and \: \: - 7$

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