Solve x2-2x-15=0 using the zero product property

(x-5)(x+3)=0
x-5=0
x=5

x+3=0
x=-3

x equal 5 and -3

Answer: the correct answer is 10step-by-step explanation: let the number be n, then the expression becomes,then“twelve more than the quotient of a number and two, decreased by four” iswhen n=4,we substitute 4 whetever we see n to get,we simplify to obtain,we further simplify to get,therefore the correct answer is c.