Answer:
(x-3)(x+5)
Step-by-step explanation:
x²+2x-15 find two numbers that add to make +2 and make a product of -15
-3×5=-15
-3+5=2
x²+2x-15 = (x-3)(x+5)
hello :
x²+2x-15=0
(x²+2x+1)-1-15=0
(x+1)²-16=0
(x+1)²-4² = (x+1-4)(x+1+4) use identity : a²-b² = (a-b)(a+b)
