3x +2 = 11 . . . . . .add 9 to match the expression for XZ
The length of each diagonal is 11 units.
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Note that we took a little shortcut to the solution. We don't actually need to know the value of x. We only need to know the value of one of the expressions for diagonal length. The expression containing "3x" is the most convenient to determine.
(x²+4x+4)-4+(y²-6y+9)-9=-4
(x+2)²+(y-3)²=9
(x+2)²+(y-3)²=3²<span> Circles follow the form: (x-a)+(y-b)=r</span><span>² </span><span>Therefore the center of the circle is at (-2,3) and the radius is 3.</span>
