exam Maths Puzzle Numerical Ability

on page 842 lesson 10-2 number 11 is what i need help on the question is

-3x^2+6x-9=0

i would realy appreaciate it if you could help. Thanks!

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exam Other Question

write equation in standard form?

y+9=-3(x-2)
Can someone please help me. If y=cuberoot(x)-1 fill in the following table for x=0,1,2,3,4. Round to three deccimal places where necessary, explain why no negative values are chosen as values to substitute in for x. Thank you