First lets write out the equation 7x - 12 = x^2 7x = x^2 + 12 x^2 - 7x + 12 then factor (x-4)(x-3) x= 4, 3 To check if we have any extraneous solutions we plug them back into our equation. (4)^2 - 7(4) + 12 = 0 (3)^2 - 7(3) + 12 = 0
since they both equal 0, your answer is both 4 and 3
