The general form of the equation of a circle is 7x2 + 7y2 − 28x + 42y − 35 = 0. The equation of this circle in standard form is . The center of the circle is at the point , and its radius is units.
2 answers:
Answer:
(X-2)^2+(y+3)^2=18 , (2,-3), 3(2^(1/2))
Step-by-step explanation:
7 x² + 7 y² - 28 x + 42 y - 35 = 0 /: 7 x² + y² - 4 x + 6 y - 5 = 0 ( x² - 4 x + 4 ) + ( y² + 6 y + 9 ) - 4 - 9 - 5 = 0 The equation in the standard form is:( x - 2 )² + ( y + 3 )² = 18 The center is at the point ( 2, - 3 ) . Its radius is: √18 = 3√2 units.
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Step-by-step explanation:
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| - 4 | = 4
Thus :
f ( | - 4 | ) = f ( 4 )
f ( 4 ) = ( 4 )^2 - 2(4) + 4
f ( 4 ) = 16 - 8 + 4
f ( 4 ) = 16 + 4 - 8
f ( 4 ) = 20 - 8
f ( 4 ) = 12