Question

What should be added to x² + 1 to get 3x² - 1

Answer 1

Answer:

2x^2-2

Step-by-step explanation:

Let  it be y

x^2+1+y=3x^2-1

y=3x^2-1-x^2-1

y=3x^2-x^2-1-1

y=2x^2-2

Answer 2

Answer:

it's very simple

see let's take the number y

Step-by-step explanation:

x²+1 + y =3x²-1

so y = 3x²-1 - x²- 1

therefore 3x² -'x² and -1 - 1

and the number will be 2x² - 2

as -1 - 1 is -2

hope it help you thanks you