Beyond the Basics

  1. 115. 23 or 23

  2. 117. 0 or 8

  3. 121. 2

  4. 123. ax2+bx+c=ax2a(r+s)x+ars=a(x2rxsx+rs)=a[x(xr)s(xr)]=a(xr)(xs)

  5. 125.

    1. x2x12=0

    2. x210x+25=0

    3. x26x+7=0

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