What is factor m^2-4mn-21n^2 ?

The solution to factor m^2-4mn-21n^2 is (m+3n)(m-7n)

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factor m^2-4mn-21n^2

factor

m^{2} - 4 mn - 21 n^{2}

(m + 3 n) (m - 7 n)

Solution steps

m^{2} - 4 mn - 21 n^{2}

Break the expression into groups

= (m^{2} + 3 mn) + (- 7 mn - 21 n^{2})

Factor out

m

from

m^{2} + 3 mn : m (m + 3 n)

Factor out

- 7 n

from

- 7 mn - 21 n^{2} : - 7 n (m + 3 n)

= m (m + 3 n) - 7 n (m + 3 n)

Factor out common term

m + 3 n

= (m + 3 n) (m - 7 n)

(\frac{1}{243})^{\frac{1}{5}}

\frac{- 1}{2} + 2

\frac{x}{2} - \frac{1}{8} < \frac{7}{8} + x

1 - \frac{3 x}{2} \geq x - 4

- 9 i^{3} + i^{2}

What is factor m^2-4mn-21n^2 ?
The solution to factor m^2-4mn-21n^2 is (m+3n)(m-7n)