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solve by factoring
1.4x²+10x=0
2.x²-10x+25=0
3.4x²-9=0

solve by completing the square
1.x²+14x=32
2.r²-10r=-17
3.r²+4r=-1

solve using quadratic formula
1.x²+7x+12=0
2.x²-6x+9=0
3.2x²-14x+20=0

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