exam Maths Puzzle Numerical Ability

given c=(b)(d/a)(834 a=1,000,000 b=250 d=8,400

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exam Other Question

How can you use the discriminant to write a quadratic equation that has two solutions? I typed in the wrong equation:

Should be 16-4(y+1) = y+6+5y

I got as far as 16-4y-4 = y+11y