Question

if x+y=8 and xy=15,find xsquare +y square
​

Answer 1

Answer:

34

Step-by-step explanation:

please follow my friend Rajpalmali1,.Her I'd tip in my following list

Answer 2

Explanation:

we know that,

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

x+y = 8 [given]

xy = 15[given]

now,

$(8) {}^{2} = {x}^{2} + {y}^{2} + 2(15)$

$64 = {x}^{2} + {y}^{2} + 30$

$64 - 30 = {x}^{2} + {y}^{2}$

$34= {x}^{2} + {y}^{2}$

${x}^{2} + {y}^{2} = 34$

Mark me brainliest