Question

When x+y=8 and xy=11 find the value of x square + y square

Answer 1

Answer:

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Answer 2

Answer:

Step-by-step explanation:

Given:

X+y=8

Squaring both sides

X^2+y^2+2xy=64

And as xy is given =11

Hence 2xy will be 22

And therefore, x^2+y^2=64-22

X^2+y^2=42