Question

How many solutions does x2 - 10x = -25 have?

Answer 1

To solve, first add 25 to both sides to get

${x}^{2} - 10x + 25 = 0$

Then factor to get

$(x - 5)(x - 5) = 0$

$x - 5 = 0$

$x = 5$

There is only one solution, x = 5.