Question

can some one correct my work see if its right?
part 1

Answer 1

for the first question
Δ = b^2 -4ac = (-2)^2 - 4(2)(1) = 4-8=-4

Answer 2

what aboutthe first question?

Answer 3

some one plas tell what i go wrong

Answer 4

all the others are correct
only in the first question it must be (-4) instead of (-8)

Answer 5

agree ^^