-5 sqaure root of 40

Question

simplest radical form

Answer 1

-5 sqrroot 40

40 = 4 * 10 and the sqrroot of 4 is 2

so pull a 2 out of the sqrroot and have -5*2 sqrroot 10

then -5*2 = -10

final anwer -10 sqrroot 10