What is factor a^2-a-90 ?

The solution to factor a^2-a-90 is (a+9)(a-10)

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factor a^2-a-90

factor

a^{2} - a - 90

(a + 9) (a - 10)

Solution steps

a^{2} - a - 90

Break the expression into groups

= (a^{2} + 9 a) + (- 10 a - 90)

Factor out

a

from

a^{2} + 9 a : a (a + 9)

Factor out

- 10

from

- 10 a - 90 : - 10 (a + 9)

= a (a + 9) - 10 (a + 9)

Factor out common term

a + 9

= (a + 9) (a - 10)

2 x (x - 7) = 0

4 x^{2} - 24 > x^{2} + 14 x

∣ 8 - 4 x ∣ > 12

\frac{- 7 - 13 i}{- 10 - 3 i}

y, y^{2} = x^{2} (x + 1)