find a if 3x² + x - a = 7 when x = -1
Answers
Answered by
0
Answer:
-5
Step-by-step explanation:
3x²+x-a=7
3×-1²+(-1)-a=7
3-1-a=7
2-a=7
-a=7-2
a= -5
Answered by
0
Answer:
a =-5
Step-by-step explanation:
3x^2+x-a=7 x=5
3(-1)^2 +(-1)-a=7
3-1-a=7
-1-a=7-3
-1-a=4
-a=4+1
-a=5
a=-5
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