if 3x+4y = 16 & xy = 4;find the value of 9x square root + 16y square root
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Hey !!
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Here is your answer !!!
(3x + 4y)2 = (3x)2 + (4y)2 + 2 ( 3x × 4y )
(16)2 = 9x2 + 16y2+ 2 (12xy)
256 = 9x2 + 16y2 + 2 ( 12 × 4)
256 = 9x2 + 16y2 + 96
9x2 + 16y2 = 256-96 =160
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Here is your answer !!!
(3x + 4y)2 = (3x)2 + (4y)2 + 2 ( 3x × 4y )
(16)2 = 9x2 + 16y2+ 2 (12xy)
256 = 9x2 + 16y2 + 2 ( 12 × 4)
256 = 9x2 + 16y2 + 96
9x2 + 16y2 = 256-96 =160
zofia1:
please solve this question also: the no. x is 2 more than the no. y. if the sum of the squares of x And y is 34; find the product of x And y
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