Answer:
x=5
Step-by-step explanation:
One of the solutions to \(x^2 - 2x - 15 = 0\) is x = −3
To find out the other solution, we factor the x^2-2x-15
Product is -15 and sum is -2
\(-5 \cdot 3 = -15\)
\(-5+3= -2\)
So factors are -5 and 3
\(x^2 - 2x - 15 = 0\)
\((x-5)(x+3)= 0\)
we set each factor =0 and solve for x
\(x-5=0, x=5\)
\(x+3=0, x=-3\)
other solution is x=5
