Question

3x^2-4x+8=0
if x= -2​

Answer 1

Answer:

28 is your answer

Step-by-step explanation:

3x²-4x+8=0

3×(-2)²-4×(-2)+8

3×4+8+8

12+16

28

Answer 2

${3x}^{2} - 4x + 8 = 0 \: \: \: when \: x = - 2 \\ {3 \times - 2}^{2} - 4 \times - 2 + 8 = 0 \\ - 36 \times - 16 + 8 = 0 \\ 584 \: \cancel = \: 0$