Question

find experimentally the negative square root of xx-3x-10

Answer 1

${x}^{2} - 3x - 10 = 0 \\ {x }^{2} - 5x + 2x - 10 = 0 \\ x |x - 5| + 2 |x - 5 | = 0 \\ x - 5 = 0 \: orx + 2 = 0 \\ thusx = 5 \: or \: x = - 2$