TS ICET 24 May 2019 Shift 1 Paper

Question : 123 of 200

Marks: +1, -0

3x - 4y = 7 ; xy = 5 ⇒

9x^2 + 16y^2

Solution:

3x – 4y = 7

Squaring on both sides

9 x^{2}+16 y^{2}-24 x y=49

9 x^{2}+16 y^{2}=49+24 × 5

=169

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