Question

13. Solve –5√ x = –15. A. x = –9 B. x = –7 C. x = 9 D. x = 7

Answer 1

`Domain:x\geq0\\\\-5√(x)=-15\qquad\text{divide both sides by (-5)}\\\\√(x)=3\to \boxed{x=9}\to\boxed{C.}`