Question

Factorise 20x² + 19x - 1
please tell me this answer ​

Answer 1

Step-by-step explanation:

How to solve your problem

202+19−1

20x^{2}+19x-120x2+19x−1

Grouping

1

Use the sum-product pattern

202+19−1

20x^{2}+{\color{#c92786}{19x}}-120x2+19x−1

202+20−−1

20x^{2}+{\color{#c92786}{20x}}{\color{#c92786}{-x}}-120x2+20x−x−1

2

Common factor from the two pairs

202+20−−1

20x^{2}+20x-x-120x2+20x−x−1

20(+1)−1(+1)

20x(x+1)-1(x+1)20x(x+1)−1(x+1)

3

Rewrite in factored form

20(+1)−1(+1)

20x(x+1)-1(x+1)20x(x+1)−1(x+1)

(20−1)(+1)

(20x-1)(x+1)(20x−1)(x+1)

Solution

(20−1)(+1)

Answer 2

Answer:

(x+1) (20x-1)

Step-by-step explanation:

Hope it helps.

Have a nice day!