Which expression is equivalent to (2x^2+6x-3) - (x^2-2x-7) ?

x^2 + 4x + 4

Step-by-step explanation:

Add the values with the same variables of x ...

Dont that the negative sign is also multiplied into the bracket of (x^2 - 2x - 7)

(2x^2 - x^2) + (6x - 2x) + (-3 + 7)

; x^2 + 4x + 4