Question

find ✓x + ✓2x + ✓3x write your answer​

Answer 1

$\sqrt{2x + 9} + x = 13 \\ \\ \sqrt{2x + 9} = 13 - x \\ \\ on \: squring \: we \: get \\ 2x + 9 = {x}^{2} + 169 - 26x \\ = {x}^{2} + 160 - 28 \times = 0 \\ = {x}^{2} - 20 - 8x + 160 = 0 \\ = ({x}^{2} - 20)(x - 8) = 0 \\ x = 20 \: ro \: x = 8 \\ \\ but \: x = 20 \: does \: not \: satisfy \\ ans \: is \: x = 8$