3x^2-12x factorise in the form (x+b)(x-b)
1 answer:
Answer:
Step-by-step explanation:
cannot be factorised in the form (x+b)(x-b) unless one of the b's is zero, so I wonder if the expression is incomplete?
To factorise , take out the common factor
:
Therefore, x = 0 and x = 4
- - - - - - - - -
factorised in the form (x+b)(x-b) would be
but it is not usual to have a zero in a factorised form.
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Given:
A driver is below the surface of the water at - 15m. he dives down by 6m, then rises 4m.
To find:
The current location of the driver.
Solution:
In this problem, negative sign is used for downward direction or the distance below the surface of the water.
Initial location = -15 m
Dives down by 6m, it means - 6m, then rises 4m, it means 4 m.
Now, the current location is
Therefore, the correct location of the driver is at -17 m it means her is 17 m below the surface of the water.