Question

If x+y = 6 and x²+y² = 25 find xy

Answer 1

Answer:

cu=5.5 or. 11/2

Step-by-step explanation:

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Answer 2

Answer:

Given:

x+y=6

x²+y²=25

To find:-

xy=?

Using Indices,

$(x + y)^{2} = {x}^{2} + y^{2} + 2xy$

Substituting the values....

${6}^{2} = 25 + 2xy$

$36 - 25 = 2xy$

$11 = 2xy$

$Therefore, \\ xy = \frac{11}{2}$

$xy = 5\frac{1}{2} \: \: \: OR \: \: \: xy = 5.5$