Determine the number that should be added to complete the square of the expression. Then factor the expression.x2 - 
x
A. 
; 
2
B. 
; 
2
C. 
; 
2
D. 
; 
2
Answer: D
Mathematics
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A. 5
B. 
C. 10
D. 25
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Solve the system by the elimination method.4x + 4y = -20-2x + 2y = 10
A. ? B. {(-5, 1)} C. {(-6, 1)} D. {(-5, 0)}
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A. A 10-pack of computer disks B. A 7-pack of computer disks
Mathematics