exam Maths Puzzle Numerical Ability

Can I have some help with this equation?

x^2-6/5x+9/25=0

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exam Other Question

2x+5-3(x+7)=4-6x

(x+2)(3x-5)=3x(x-8)+15 Could you please help with this. Find the corresponding y values for x=-4,-3,-2,-1,0,1,2 if y=x^2+2x-15 Thank you