exam Maths Puzzle Numerical Ability

How would you solve this equation?

2x(3x-5)=0

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exam Other Question

Fred Ferguson ivested $5000 for one year,part at 9% annual interest and the rest at 12% annual interest.The interest from the investment at 9% was $198 more than the intrest from t Find the equation of the line that goes through the given point and has the given slope. Write the answer in slope-intrecept form.

(-1,-5),-8

this is what I did
-5y=-8x + -1 I got b= -13 which is incorrect