Question

factorise the following by splitting the middle term z²-3z-54​

Answer 1

Answer:

z²-3z-54 =(z-9)(z+6)

Step-by-step explanation:

z²-3z-54=z²-9z+6z-54

=z(z-9) +6(z-9)

z²-3z-54 =(z-9)(z+6)

Answer 2

Answer:

z

${z}^{2 } - 9z + 6z - 54 \\ z (z - 9) + 6(z - 9) \\ (z - 9) = 0 \: \: or \: (z + 6) = 0 \\ z = 9 \: \: or \: \: z = - 6$

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