8x2 + 16x + 8 = 0
x=5
x= 2 because 2x+4=16 4x2=8 8+2 or 8x2=16
8x2 + 16x + 8 = 8*(x2 + 2x + 1) = 8*(x + 1)2
8x2-2x-15 = 0 (2x-3)(4x+5) = 0 x = 3/2 or x = -5/4
8x2 + 16x + 8 = 0
It is: 25-4(8*6) = -167
x=5
x= 2 because 2x+4=16 4x2=8 8+2 or 8x2=16
8x2 + 16x + 8 = 8*(x2 + 2x + 1) = 8*(x + 1)2
(x2 + 4 - 2sqrt(3)) (x2 + 4 + 2sqrt(3))
16.
15 = 8x2 - 14x; whence, 8x2 - 14x - 15 = (2x - 5)(4x + 3) = 0. Therefore, x = 5/2 or -3/4.
4
(4x + 3)(2x - 1) so x = -0.75 or 0.5
8x2-2x-15 = 0 (2x-3)(4x+5) = 0 x = 3/2 or x = -5/4
(-2)2-4*8*8 = -252 The discriminant is less than zero so there's no solution to the quadratic equation.