Question

find the value of expression (81x²+16y²-72xy) when x =2/3 and y=3/4

Answer 1

Here is your answer in above picture

Answer 2

Answer:

9

Step-by-step explanation:

(8x²+16y²-72xy)

given,

x=2/3

y=3/4

81(2/3)²+16(3/4)²-72(2/3)(3/4)

81(4/9)+16(9/16)-72(1/2)

9(4)+1(9)-36

36+9-36=9

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