Respuesta :
Answer:
3 or -5
Step-by-step explanation:
x^2 + 2x - 15 = 0
To solve this you need to factorise:
(x + 5) (x - 3) = 0
Now find the x value for each of these brackets
(x + 5) = 0 or (x - 3) = 0
x = -5 or x = 3
Answer:
Step-by-step explanation:
x=−5 or x=3
Explanation:
the factors of - 15 which sum to + 2 are + 5 and - 3
⇒(x+5)(x−3)=0
equate each factor to zero and solve for x
x+5=0⇒x=−5
x−3=0⇒x=3
