mathlearn
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There's a rectangle which the length is x+1 and the breadth is x.
X is $$-1\pm\sqrt{11}$$
Show that the area is $$11-\sqrt{11}$$
The workings I have done for far are below.
$$(-1\pm \sqrt{11})*(-1 \pm \sqrt{11} +1) $$
$$(-1\pm \sqrt{11})*( \pm \sqrt{11} ) $$
$$(-1\pm \sqrt{11})*( \pm \sqrt{11} ) $$
$$(-1\pm \sqrt{11})*( \pm \sqrt{11} ) $$
Where have I done wrong ? And the square root of the solution of the area you are asked to show is a negative. A comment here would be appreciated.
Many thanks :)
X is $$-1\pm\sqrt{11}$$
Show that the area is $$11-\sqrt{11}$$
The workings I have done for far are below.
$$(-1\pm \sqrt{11})*(-1 \pm \sqrt{11} +1) $$
$$(-1\pm \sqrt{11})*( \pm \sqrt{11} ) $$
$$(-1\pm \sqrt{11})*( \pm \sqrt{11} ) $$
$$(-1\pm \sqrt{11})*( \pm \sqrt{11} ) $$
Where have I done wrong ? And the square root of the solution of the area you are asked to show is a negative. A comment here would be appreciated.
Many thanks :)