Question

If x = - = 7 = and z = 12 18 find the value of 2x + xy 1-03-12 23)-3424*3) X ху 2 y y2y​

Answer 1

Answer:

3x+2y=12

Squaring both sides, we get

(3x+2y)

2

=144

⇒9x

2

+4y

2

+2×3x×2y=144

⇒9x

2

+4y

2

=144−12xy

⇒9x

2

+4y

2

=144−12×6 since xy=6

⇒9x

2

+4y

2

=144−72=72

∴9x

2

+4y

2

=72

Step-by-step explanation:plz mark the brainliest