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OpenStudy (anonymous):
Solve –3x2 + 30x – 90 = 0
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OpenStudy (anonymous):
–3x2 + 30x – 90 = 0 -3(x^2-10x+9)=0 or x^2-10x+9=0 x^2-9x-x+9=0 x(x-9)-1(x-9)=0 (x-9)(x-1)=0 or x-9=0 or x-1=0 hence x=9 or x=1
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