Solve n^2+n-420=0

Evaluate

n^{2} + n - 420 = 0

Factor the expression

More Steps

(n - 20) (n + 21) = 0

When the product of factors equals 0,at least one factor is 0

n - 20 = 0 n + 21 = 0

Solve the equation for n

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n = 20 n + 21 = 0

Solve the equation for n

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n = 20 n = - 21

Solution

n_{1} = - 21, n_{2} = 20

Solve the quadratic equation