Question

IF 3x-2y=8 and xy =8 then evaluate

Answer 1

Step-by-step explanation:

3x-2y=8 [squaring both sides ]

(3x-2y)²=(8)²

(3x)²-2*3x*2y+(2y)²=64

9x²-12xy+4y²=64 [substituting values ]

9x²-12*8+4y²=64

9x²+4y²=64+96

therefore ,9x²+4y²=160