Multiply:

(7x-2)(2x-7)

Hint: use FOIL.

Here is an example to help you.

(x + 2)(3x - 4)

FIRST terms multiplied: x•3x = 3x^2
OUTER terms multiplied: x(-4) = -4x
INNER terms multiplied: 2•3x = 6x
LAST terms multiplied: 2(-4) = -8

Add them up: 3x^2 - 4x + 6x - 8 = 3x^2 + 2x - 8