what should be added to 5 x square - 2 x minus 9 to get minus 6 minus 5 x + 6 square
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- let the required equation be "z". 2)).[z+(5x^2-2x-9)]=6-5x+6x^2. 3)) Z=6-5x+6x^2-5x^2+2x+9=x^2-3x+15. is the required equation.
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