Question

whole square of 3+2squareroot5

Answer 1

${(3 + 2 \sqrt{5}) }^{2} \\ \\ = {3}^{2} + {(2 \sqrt{5} )}^{2} + 2 \times 3 \times 2 \sqrt{5} \\ \\ = 29 + 12 \sqrt{5} \\ \\ {(x + y)}^{2} = {x}^{2} + {y}^{2} + 2xy$

hope it helps