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factorise: 3+23z-8z2

3 + 23z - 8z2

-8z2 + 23z + 3

-8z2 + 24z - z + 3

-8z ( z - 3 ) -1 ( z - 3 )

( -8z - 1 ) ( z - 3 )

  • 4
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3+23z-8z2} multiply with -1

-3-23z+8z2

8z2 -23z -3

8z2-24z+1z-3

8z(z-3)+1(z-3)

(8z+1)(z-3)

  • -1
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