Math, asked by jjatin601, 11 months ago

if 9 x square + 25 y square is equal to 81 and xy is equal to -6 find the value of 3 x + 5 y

Answers

Answered by aaravtyagi2611

0

Answer:

Step-by-step explanation:

9x^2+25y^2=81

xy=-6

(3x+5y)^2=9x^2+25y^2+2xy

=81+-12

=69

therefore 3x+5y=root 69

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