if x=-2 is a root of the equation x² -3x - a =0, then find the value of a.
Answers
Answered by
1
Answer:
the value of a is 10......
put x=-2
Answered by
1
Answer:
(-2)^2-3×-2 -a=0
4+6=a
10 = a
therefore the value of a =10
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