exam Maths Puzzle Numerical Ability

if the roots of the eq a(b-c)x square +b(c-a)x+c(a-b)=o are equal show that 2/b=1/a+1/c

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exam Other Question

Please help to graph the inequality

x <-3
y is -4
slope is -2

thanks Determine whether each ordered pair is a solution of the given equation.

y=8-4x (8,0), (16,-2), (3,-4)