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If x+y=8 and xy=15 then find …

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If x+y=8 and xy=15 then find the value of x^2+y^2 Please answer my question...

Posted by Aadya Raikar 4 years, 9 months ago

CBSE > Class 09 > Mathematics

5 answers

Gyayak Jain 4 years, 9 months ago

50-1+100-50-50=??

Hitesh Mahendra Mahajan 4 years, 9 months ago

36

Shashank Sah 4 years, 9 months ago

x +y = 8 xy = 15 x+y =8 Squaring both side (x+y)^2={8}^2 x^2+y^2+2xy=64…........(xy=15) x^2+y^2+30=64 x^2+y^2=64-30 x^2+y^2=34

Shashank Sah 4 years, 9 months ago

x

Yogita Ingle 4 years, 9 months ago

x + y = 8 ............ (i)

xy = 15 ........... (ii)

(x+y)² = 8²

x² + y²+ xy = 64

x² + y² + 15 = 64

x² + y² = 64 - 15

x² + y²= 49

ANSWER

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