Factor completely. 5x2 - 2x - 7

(5x-7)(x+1)

Step-by-step explanation:

Here, we want to factor the given polynomial

That would be;

5x^2-7x+5x-7

= 5x^2+5x-7x-7

= 5x(x + 1) -7(x + 1)

= (5x-7)(x+ 1)

9514 1404 393

  B. only (-2, 9)

Step-by-step explanation:

A graph of the equation makes it easy to see that (-2, 9) is a solution and (2, -9) is not.

You can try these values of x in the equation to see what the corresponding y-values are.

  y = -2{-2, 2} +5 = {4, -4} +5 = {9, 1}

Points on the line are (-2, 9) and (2, 1).

(2, -9) is not a solution.