Answer:
Explanation:
Use the quadratic formula to find the roots of x²+8x+15
x = [-8±√(8²-4·1·15)]/[2·1] = [-8±√4]/2 = -3, -5
make factors from the roots
x²+8x+5 = (x+3)(x+5)
7.5m questions
10.1m answers