Question

`(1-(-1)*2)x^(2) -1`

Answer 1

`3x {}^(2) - 1`

Explanation:

(1-(-1)×2) x² - 1

When there is a - in front of an expression in parentheses, change the sign of each term of the expression and remove the parentheses.

(1+1x2)x2-1

Any expression multiplied by 1 remains the same

(1+2) x²-1

Add the numbers

3x2-1