2x square +x+3=21-x square -2​x

Answers (1)

2x2+x+3=21-x2-2x

3x2+3x-18=0

3x2+9x-6x-18=0

3x(x+3)-6(x+3)=0

(x+3)(3x-6)=0

x =-3, x=2

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