find the value of a if the value of 2xpower2 + x-a =8 when x=-1
Answers
Answered by
1
ANSWER: -5
Step-by-step explanation:
Given: 2x
2
+x−a=5
⇒2(0)
2
+0−a=5 [Putting x=0]
⇒0+0−a=5
⇒a=−5
Hence, the value of a is −5.
Answered by
1
Answer:
a = - 7
Step-by-step explanation:
Given that ;
2x² + x - a = 8
x = -1
Substitute x value in 2x² + x - a = 8 :
2 ( -1 )² + ( -1 ) - a = 8
2 ( 1 ) + ( -1 ) - a = 8
2 - 1 - a = 8
1 - a = 8
- a = 8 - 1
a = - 7
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