Factorise the following : z^2-4z-77
Answers
Answered by
15
Answer:
z^2 - 4z - 77
=z^2 +7z - 11z - 77
=z(z + 7) -11(z + 7)
=(z + 7)(z - 11)
Step-by-step explanation:
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Answered by
0
Answer:
(z-11) (z+7)
Step-by-step explanation:
z^2-4x-77
= z^2-11z+7z-77
= z(z-11) + 7(z-11)
= (z+7) (z-11)
= z= -7 or 11
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