solve for x 4.2^(2x+1)-9.2^(x)+1=0 Share with your friends Share 14 Manbar Singh answered this 4.22x+1 - 9.2x + 1 = 0⇒8 . 22x - 9 . 2x + 1 = 0Let 2x = y, we get8y2 - 9y + 1 = 08y2 - 8y - y + 1 = 0⇒8yy-1 - 1y-1 = 0⇒8y-1 y-1 = 0⇒y = 18 or y = 1Now, 2x = 18 or 2x = 1⇒2x = 2-3 or 2x = 20⇒x = -3 or x = 0 53 View Full Answer