exam Maths Puzzle Numerical Ability

Need help with question #14. I need to solve for the roots of each quadratic equation using the factoring method, but I need to place the equation in standrard form before factoring. Thanks so much in advance for time and help. =)
x^2+3x-40= 0

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exam Other Question

((x+7)^2/25)+((y-3)^2/16)=1 1000r^3=0

(15/16x-1)^2=0