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rewona [7]
3 years ago
5

Quadratic equations and functions. n^2+2n-15=0

Mathematics
2 answers:
sveta [45]3 years ago
8 0

Answer:

n = -5, 3.

Step-by-step explanation:

n^2 + 2n - 15 = 0

Let's check if we can factor this quadratic:

We need 2 numbers whose product is -15 and whose sum is +2.

There are 2 such numbers and they are +5 and -3, so the factors are:

(n + 5)(n - 3) = 0.

n + 5 = 0 or n - 3 = 0

therefore the zeroes are -5 and 3.

Zolol [24]3 years ago
6 0
The answer is n=3 or n=-5
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