37
x^2 - 16 x + 64
It will touch the x axis when y = 0
So
x^2 - 16x + 64 = 0 factor
(x - 8)^2 = 0 take the square root of both sides
x - 8 = 0
x = 8
38
8x*2 + 10x - 2 = 0
x = ( -10 ±√ [ 10^2 - 4(8)(-2) ] ) / [ 2*8 ]
x = ( -10±√ [ 100 + 64]) / (16)
x = (-10 ±√164) / 16
x = (-10 + √164 ) / 16
x = 0.18