x square -4x+4y+y square
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Answered by
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Answer:
Solve by substitution x^2 + y^2 = 8 and x - y = 4
The equations x^2 + y^2 = 8 and x - y = 4 have to be solved by substitution.
x - y = 4
=> x = 4 + y
Substitute in x^2 + y^2 = 8
=> (4 + y)^2 + y^2 = 8
=> 16 + y^2 + 8y + y^2 = 8
=> y^2 + 4y + 4 = 0
=> (y + 2)^2 = 0
=> y = -2
x = 4 + y = 2
Step-by-step explanation:
no
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