factorise - x² - 19x + 84
Answers
Answered by
0
Answer:
(a-b)^2
Step-by-step explanation:
=√x^2-19x+84
=x-9.5
pls follow
Answered by
3
Step-by-step explanation:
- x^2 - 19 x + 84
- x^2 - ( 12+7 ) x + 84
- x^2 - 12x - 7x + 84
- x( x - 12 ) - 7( x - 12 )
- ( x-12) ( x-7)
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