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Substitution is normally the fastest way. You can also expand and compare coefficients of x and x^0.
Date Posted:
6 years ago
Thanks
Why subs x=2?I dun understand
Subst. Is short for substitute x = 2 into the equation. The idea being to eliminate a from the equation.
Ok now i understand
Thanks
I am sorry,what about subs x=0,i dun understand why sub 0
For the second valie, you can use any value of x other than 2, which was already used. X = 0 is easiest. Try with x=3 or some other value, for the second step (to find the value of a) and you will see.