What is factor 21x^2+13x-20 ?

The solution to factor 21x^2+13x-20 is (7x-5)(3x+4)

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factor 21x^2+13x-20

factor

21 x^{2} + 13 x - 20

(7 x - 5) (3 x + 4)

Solution steps

21 x^{2} + 13 x - 20

Break the expression into groups

= (21 x^{2} - 15 x) + (28 x - 20)

Factor out

3 x

from

21 x^{2} - 15 x : 3 x (7 x - 5)

Factor out

4

from

28 x - 20 : 4 (7 x - 5)

= 3 x (7 x - 5) + 4 (7 x - 5)

Factor out common term

7 x - 5

= (7 x - 5) (3 x + 4)

4 x - 5 = 11

\frac{1}{2} x^{- \frac{1}{2}} \cdot x

2 (x - 3) + (x + 3) = 6 x

x^{2} - 12 x - 36 = 0

x^{2} - 10 x + 4 = 0

What is factor 21x^2+13x-20 ?
The solution to factor 21x^2+13x-20 is (7x-5)(3x+4)