Which expressions represent a quadratic expression in factored form?

select all the correct answers.

x2 − x − 72
(x + 3)(x − 7)
-8(x + 56)
(x + 1)(x − 2)
(x − 2) + (x + 3)

quadratic equation is 2 degree polynomial

x2 - x -72 = x2 - 9x +8x -72

x(x - 9 ) + 8(x - 9) = (x -9) (x+8)

1st correct - quadratic

2nd correct - quadratic

3rd - it's linear equation, not quadratic

4th - correct - quadratic

5th - linear - not correct

answer: x

step-by-step explanation:

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

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

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option