Find the values of the following expressions:64x2 + 81y2 + 144xy when

1.	Find the values of the following expressions:64x2 + 81y2 + 144xy when x = 11 and y = 4/3
Answer» Given , 64x² + 81y²+ 144xy when x = 11 and y = 4/3 Using formula (a + b)² = a² + b² +2ab (8x)² + 2 (8x) (9y) + (9y)² (8x + 9y) = [8 (11) + 9 (4/3)]² = (88 + 12)² = (100)² = 10000

Find the values of the following expressions:64x2 + 81y2 + 144xy when x = 11 and y = 4/3

Answer»

Given ,

64x² + 81y²+ 144xy when x = 11 and y = 4/3

Using formula (a + b)² = a² + b² +2ab

(8x)² + 2 (8x) (9y) + (9y)² (8x + 9y)

= [8 (11) + 9 (4/3)]²

= (88 + 12)²

= (100)²

= 10000

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