What is factor a^2-3a-4 ?

The solution to factor a^2-3a-4 is (a+1)(a-4)

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factor a^2-3a-4

factor

a^{2} - 3 a - 4

(a + 1) (a - 4)

Solution steps

a^{2} - 3 a - 4

Break the expression into groups

= (a^{2} + a) + (- 4 a - 4)

Factor out

a

from

a^{2} + a : a (a + 1)

Factor out

- 4

from

- 4 a - 4 : - 4 (a + 1)

= a (a + 1) - 4 (a + 1)

Factor out common term

a + 1

= (a + 1) (a - 4)

x^{2} - 8 x - 105 = - 10

\frac{3 x + 5}{3} = 9

\frac{n ^{2} - n - 12}{n ^{2} - 4 n}

∣ 7 x - 5 ∣ + 3 \geq 9

x^{2} (x + 2) (x - 3) > 0