Roots that cannot be written as exact decimals are called surds. Leaving an answer in surd form means the answer is exact. This square has an area of 3 m 2. Calculate the length of each side.

2 && +2 \\ x & = & 2 \pm \sqrt{7} \end{array}\) This gives the two solutions in surd form. To find approximate solutions in decimal form, continue to work the answer out with a calculator.