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What number must be added to the expression below to complete the square? x2 - 9x A .-18/4 B. -9/2 C 81/4 D 9/2

What number must be added to the expression below to complete the square? x2 - 9x A .-18/4 B. -9/2 C 81/4 D 9/2
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What number must be added to the expression below to complete the square?

x2 - 9x

A .-18/4
B. -9/2
C 81/4
D 9/2

asked
User Furicle
by
8.2k points

1 Answer

2 votes
Take the 'b' term and divide by 2, then square it.
(-9/2)^2 = 81/4
Letter C
answered
User JoeriShoeby
by
8.5k points
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