i need a help in this problem , please help me
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1
it iz helpful
i guess
i guess
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leader2:
which book
name of book with clss??
class 8 dav math book
i found the answer
cross chk with frndz or teacher later
wat iz it
129
100%sure
✌ ....
Correct ur answer, please
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13
Given Equation is 5x - 2y = 7 and xy = 2.
Now,
We know that (a-b)^2 = (a+b)^2 - 4ab
(5x - 2y)^2 = (5x + 2y)^2 - 4 * 5x * 2y
(7)^2 = (5x + 2y)^2 - 40(xy)
49 = (5x + 2y)^2 - 40(2)
49 + 80 = (5x + 2y)^2
129 = (5x + 2y)^2.
Therefore (5x + 2y)^2 = 129.
Hope this helps!
Now,
We know that (a-b)^2 = (a+b)^2 - 4ab
(5x - 2y)^2 = (5x + 2y)^2 - 4 * 5x * 2y
(7)^2 = (5x + 2y)^2 - 40(xy)
49 = (5x + 2y)^2 - 40(2)
49 + 80 = (5x + 2y)^2
129 = (5x + 2y)^2.
Therefore (5x + 2y)^2 = 129.
Hope this helps!
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