if (2x+3y) = 8 and xy=4 find4x square + 9 y square
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2x + 3y = 8
xy = 2
(a+b)² = a² +2ab + b²
(2x+3y)² = (2x)² +2 × 2x × 3y + (3y)²
8²= 4x²+24 + 9y²
64 - 24 = 4x²+ 9y²
∴ 4x²+ 9y² = 40
xy = 2
(a+b)² = a² +2ab + b²
(2x+3y)² = (2x)² +2 × 2x × 3y + (3y)²
8²= 4x²+24 + 9y²
64 - 24 = 4x²+ 9y²
∴ 4x²+ 9y² = 40
shanu1234567:
thnx dii
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