What is factor x^2+2x-15 ?

The solution to factor x^2+2x-15 is (x-3)(x+5)

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factor x^2+2x-15

factor

x^{2} + 2 x - 15

(x - 3) (x + 5)

Solution steps

x^{2} + 2 x - 15

Break the expression into groups

= (x^{2} - 3 x) + (5 x - 15)

Factor out

x

from

x^{2} - 3 x : x (x - 3)

Factor out

5

from

5 x - 15 : 5 (x - 3)

= x (x - 3) + 5 (x - 3)

Factor out common term

x - 3

= (x - 3) (x + 5)

20 k + 78 = 4 (5 k + 18)

(x - 1) (x + 2)^{2} - (x - 1)^{2} (x + 2)

6 y^{- 4}

(e^{x} - 2) (e^{x} - 3) \leq 2 e^{x}

\frac{11 x}{5} - \frac{4}{5} = \frac{1}{5}