Answer:
Step-by-step explanation:
1)x² - 16x = - 64
x² - 16x + 64= 0
a = 1 ; b = -16 ; c = 64
D = b² - 4ac = (-16)² - 4*1*64 = 256 - 256 =
D = 0
2) 9x² = 9x + 2
9x² - 9x - 2 = 0
D = (-9)² - 4*9*(-2) = 81 + 72
D = 153
3)x² - 3 = x
x² -x - 3 =0
D = (-1)² - 4*1*(-3) = 1 + 12 = 13
D = 13
4) 3x² + 4x + 2=0
D = 4² - 4*3*2 = 16 - 24 = -8
D = -8
5)x² - 4 = 0
D = 0 - 4*1*(-4) = 0 + 16 = 16
D = 16
